Question: What was one of the popularizers of the slogan "the customer is always right" also known as?

full_context: Document 1: Sears: Sears, short name for Sears, Roebuck & Company, is an American chain of department stores founded by Richard Warren Sears and Alvah Curtis Roebuck in 1886. Formerly based at the Sears Tower in Chicago and currently headquartered in Hoffman Estates, Illinois, it began as a mail ordering catalog company and began opening retail locations in 1925. The company was bought by the American big box chain Kmart in 2005, which renamed itself Sears Holdings upon completion of the merger. In terms of domestic revenue, Sears was the largest retailer in the United States until October 1989, when Walmart surpassed the record. It is currently the fifth-largest American department store company by sales as of October 2013 (behind Walmart, Target, Best Buy, and The Home Depot), and the twelfth-largest retailer in the country overall. Sears operates divisions in Canada and Mexico, as well as several other subsidiaries within its brand.
Document 2: Pottery Barn rule: The Pottery Barn rule is an American expression alluding to a "you break it, you buy it" policy, by which a retail store holds a customer responsible for damage done to merchandise on display. It is an analogy often used in the political or military arena to suggest that if an actor inadvertently creates a problem, the actor is obliged to provide the resources necessary to correct it.
Document 3: Does exactly what it says on the tin: "It does exactly what it says on the tin" (often quoted as "does what it says on the tin") was originally an advertising slogan in the United Kingdom, which then became a common idiomatic phrase. It colloquially means that the name of something is an accurate description of its qualities. It is akin to the previously existing phrases "by name and by nature" and "it lives up to its name".
Document 4: The customer is always right: "The customer is always right" is a motto or slogan which exhorts service staff to give a high priority to customer satisfaction. It was popularised by pioneering and successful retailers such as Harry Gordon Selfridge, John Wanamaker and Marshall Field. They advocated that customer complaints should be treated seriously so that customers do not feel cheated or deceived. This attitude was novel and influential when misrepresentation was rife and "caveat emptor" (let the buyer beware) was a common legal maxim. Variations include ""le client n'a jamais tort"" (the customer is never wrong) which was the slogan of hotelier César Ritz who said, "If a diner complains about a dish or the wine, immediately remove it and replace it, no questions asked". A variation frequently used in Germany is ""der Kunde ist König"" (the customer is king), while in Japan the motto ""okyakusama wa kamisama desu"" (お客様は神様です ) meaning "the customer is a god", is common.
Document 5: Selfridges, Oxford Street: Selfridges is a Grade II listed retail premises on Oxford Street in London. It was designed by Daniel Burnham for Harry Gordon Selfridge, and opened in 1909. Still the headquarters of Selfridge & Co. department stores, with 540000 sqft of selling space, the store is the second largest retail premises in the UK, half as big as the biggest department store in Europe, Harrods. It was named the world's best department store in 2010, and again in 2012.
Document 6: Perfect is the enemy of good: Perfect is the enemy of good is an aphorism, an English variant of the older "better is the enemy of good", which was popularized by Voltaire in French form. Alternative forms include "the perfect is the enemy of the good", which more closely translate French and earlier Italian sayings, or "[the] perfect is the enemy of [the] good enough". Similar sentiments occur in other phrases, including from English, and are all attested since around 1600.
Document 7: The customer is always right (disambiguation): The customer is always right is a popular slogan within the service industry.
Document 8: Saks Fifth Avenue: Saks Fifth Avenue is an American luxury department store owned by the oldest commercial corporation in North America, the Hudson's Bay Company. Its main flagship store is located on Fifth Avenue in Midtown Manhattan, New York City.
Document 9: Mohamed Al-Fayed: Mohamed Al-Fayed (Arabic: محمد أنور شاكر عبد السيد الفايد‎ ‎ ; born 27 January 1929) is an Egyptian business magnate. Fayed's business interests include ownership of Hôtel Ritz Paris and formerly Harrods Department Store, Knightsbridge. Al-Fayed sold his ownership of Fulham F.C. to Shahid Khan in 2013.
Document 10: Fan service: Fan service (ファンサービス , fan sābisu ) , fanservice, or service cut (サービスカット , sābisu katto ) , is material in a work of fiction or in a fictional series which is intentionally added to please the audience. The term originated in Japanese, in the anime and manga fandom, but has been used in other languages and media. It is about "servicing" the fan – giving the fans "exactly what they want." Fan service usually refers to "gratuitous titillation", but can also refer to intertextual references to other series or story and visual elements that audiences tend to desire.
Document 11: Lord &amp; Taylor: Lord & Taylor is the oldest luxury department store in the United States, headquartered in New York City. It is a subsidiary of the oldest commercial corporation in North America, the Hudson's Bay Company.
Document 12: Harry Gordon Selfridge: Harry Gordon Selfridge, Sr. (11 January 1858 – 8 May 1947) was an American retail magnate who founded the London-based department store Selfridges. His 20-year leadership of Selfridges led to his becoming one of the most respected and wealthy retail magnates in the United Kingdom. He was known as the 'Earl of Oxford Street'.
Document 13: Have a nice day: Have a nice day is a commonly spoken expression used to conclude a conversation (whether brief or extensive), or end a message by hoping the person to whom it is addressed experiences a pleasant day. Since it is often uttered by service employees to customers at the end of a transaction, particularly in Israel and the United States, its repetitious and dutiful usage has resulted in the phrase developing, according to some journalists and scholars, especially outside of these two countries, a cultural connotation of impersonality, lack of interest, passive–aggressive behavior, or sarcasm. The phrase is generally not used in Europe, as some find it artificial or even offensive. Critics of the phrase characterize it as an imperative, obliging the person to have a nice day. Other critics argue that it is a parting platitude that comes across as pretended. While defenders of the phrase agree that "Have a nice day" can be used insincerely, they consider the phrase to be comforting, in that it improves interactions among people. Others favor the phrase because it does not require a response.
Document 14: George Ludlum Hartford: George Ludlum Hartford (November 7, 1864 – September 23, 1957) was the longtime Chairman and Treasurer of the Great Atlantic and Pacific Tea Company (A&P), serving in those positions for over 40 years from 1916 until his death. He was the successor to his father, George Huntington Hartford (1832–1917) and lead the company with his younger brother, John Augustine Hartford (1872–1951). Under the terms of their father's will, the two brothers had total control of the company's voting stock as long as either was alive. "Mr. George" as he was known to distinguish him from his father, "Mr. Hartford", was considered the "financial genius" at the firm who balanced his brother, "Mr. John" who was the firm's "merchandising power". They built the chain into the world's largest retailer with annual sales of $4.5 billion in 1957 when George died. "Time Magazine" interviewed John and his brother George who were on their cover in November 1950. Wall Street Journal in an editorial on August 29, 2011 wrote "Together the brothers, neither of whom had finished high school, built what would be, for 40 years, the largest retail outlet in the world." "The New York Times" in an editorial on September 7, 2011 wrote that John and George Hartford "were among the 20th century’s most accomplished and visionary businessmen."
Document 15: Customer magazine: A customer magazine is a magazine produced by a business as a means of communicating to its customers. It is a branch of custom media, a product that broadly shares the look and feel of a newsstand or consumer magazine but is paid for in part or whole by a business. Rather than copy sales and advertising, the primary goal of a customer magazine is to achieve a particular business objective. This could be for a firm to cross- or up-sell, change brand perception or engender loyalty. In-flight magazines, sponsored by airlines, were among the first customer magazines, and remain typical of the genre. In the UK, every supermarket chain now provides a customer magazine to promote its products through recipes and other food editorial. Many prominent digitally-native companies, like WebMD and Net-À-Portér, have released customer magazines of their own. Some customer magazines carry advertising; this is often seen as a useful way to offset the cost but equally can have some benefit in making the product look more like a regular magazine.
ground_truth: the 'Earl of Oxford Street'