Question: What star of the film It Started In Naples played leading man in more than 60 motion pictures?

Context paragraphs:
Niles Welch: Niles Eugene Welch (July 29, 1888 – November 21, 1976) was an American performer on Broadway, and a leading man in a number of silent and early talking motion pictures from the early 1910s through the 1930s.

Clark Gable: William Clark Gable (February 1, 1901 – November 16, 1960) was an American film actor and military officer, often referred to as "The King of Hollywood" or just simply as "The King".  Gable began his career as a stage actor and appeared as an extra in silent films between 1924 and 1926, and progressed to supporting roles with a few films for Metro-Goldwyn-Mayer in 1931.  The next year, he landed his first leading Hollywood role and over the next three decades he became a leading man in more than 60 motion pictures.

Beacon Pictures: Beacon Pictures is an American film production and international sales company founded in 1990 by Armyan Bernstein, who is also its chairman.  The company produces motion pictures for studios such as Walt Disney Studios Motion Pictures, Universal Pictures and Sony Pictures Entertainment.

Leading man: Leading man or leading gentleman is an informal term for the actor who is the protagonist or plays a love interest to the leading actress in a film or play.  A leading man is sometimes an all-rounder; capable of singing, dancing, and acting at a professional level.

Shelley Hull: Shelley Hull (June 17, 1884 - January 14, 1919) born Shelley Vaughan Hull was an American stage actor who appeared in two motion pictures.  His Broadway popularity as a suave handsome leading man was continually on the rise until his early death at age 34 in the Influenza Pandemic of 1918.  He was married to actress Josephine Hull.  Shelley was a particular favorite of the young Billie Burke and costarred with her in several plays.  He had two brothers involved in the theater and films, Howard Hull who was married to Margaret Anglin and younger brother Henry Hull who became a well known actor on stage and in film.

John Gilbert (actor): John Gilbert (born John Cecil Pringle; July 10, 1899 – January 9, 1936) was an American actor, screenwriter and director.  He rose to fame during the silent film era and became a popular leading man known as "The Great Lover".  At the height of his career, Gilbert rivaled Rudolph Valentino, another silent film era leading man, as a box office draw.

It Started in Naples: It Started in Naples is an American romantic comedy film made by Paramount Pictures and released in August 1960.  It was directed by Melville Shavelson and produced by Jack Rose from a screenplay by Suso Cecchi d'Amico based on the story by Michael Pertwee and Jack Davies.  The Technicolor cinematography was by Robert Surtees.  The film stars Clark Gable, Sophia Loren, Vittorio De Sica and an Italian cast.

Wang Kuan-hsiung: Wang Kuan Hsiung was a lean dapper Taiwanese actor who was a well-known and popular leading man in the Kung Fu film genre of the 1970s and 1980s.  He was cast as a romantic leading man in some of his films and he gained many female fans and is still considered a heart throb He is mostly known for his role in a 1974 film as Chan Ming Lung a.k.a. "The Iron Ox" in Iron Ox, The Tiger's Killer, which is a tale about a student taking on a group of men, The Five Tigers in duels to avenge the death of his teacher.  This film also featured a well-known actor of the genre, Wong Fei-Lung

Ray Milland filmography: This is a filmography of Welsh actor Ray Milland, containing his work in theatrically released motion pictures as well as his extensive television credits.  Milland began his film career in United Kingdom in 1929 after serving three years as a guardsman in the Royal Household Cavalry, based in London.  After appearing in several British films, he came to the United States in 1930 where he spent several years playing small and supporting roles.  Eventually, in 1934, he became a contract player at Paramount Pictures where he established himself as a popular star.  Milland remained with Paramount for the next 21 years.  During his time with the studio, he developed his persona as a debonair leading man, mainly in drawing-room comedies but also occasionally in adventure and mystery films.  In 1945, Milland won the Academy Award for Best Actor for his portrayal of an alcoholic writer in "The Lost Weekend".  From there he continued as a leading man well into the 1960s, appearing in several film noirs and occasionally cast as a villain.  In 1953, Milland began working in television as both an actor and director.  He alternated between the mediums of film and television for the remainder of his career.  During the 1960s and 1970s, Milland frequently worked in science fiction and horror films.  He also directed himself in four films.

Motion Picture Production Code: The Motion Picture Production Code was the set of industry moral guidelines that was applied to most United States motion pictures released by major studios from 1930 to 1968.  It is also popularly known as the Hays Code, after Will H. Hays, who was the president of the Motion Picture Producers and Distributors of America (MPPDA) from 1922 to 1945.  Under Hays' leadership, the MPPDA, later known as the Motion Picture Association of America (MPAA), adopted the Production Code in 1930 and began strictly enforcing it in 1934.  The Production Code spelled out what was acceptable and what was unacceptable content for motion pictures produced for a public audience in the United States.

Supporting paragraphs: It Started in Naples Clark Gable
Answer: Clark Gable