Question: Edgar Vincent was an American publicist and actor of German birth, He went on to specialize in being a publicist for opera singers, helping shape and forward the careers of major stars like which French-American operatic soprano and actress who had an active career from the late 1920s through the early 1970s?
Context: Christine Weidinger (born March 31, 1946) is an American operatic soprano who has had an active international career in operas and concerts since the early 1970s.  Her career started at the Metropolitan Opera, after which she was active as a resident artist with opera houses in Germany during the late 1970s and 1980s.  From the 1970s through the 1990s she worked as a guest artist with many leading opera houses throughout Europe, South America, and the United States. Anna Deinet (also Anna von Possart and Anna Deinet-Possart) (22 February 1843 - 18 August 1919) was a German operatic soprano who had an active career during the latter half of the 19th century.  She had a lengthy career at the Bavarian State Opera where she particularly excelled in coloratura soprano roles.  She is best remembered today for portraying Brangäne in the world premiere of Richard Wagner's "Tristan und Isolde" in 1865 and Helmwige in the premiere of Wagner's "Die Walküre" in 1869. Lily Pons (April 12, 1898 – February 13, 1976) was a French-American operatic soprano and actress who had an active career from the late 1920s through the early 1970s.  As an opera singer she specialized in the coloratura soprano repertoire and was particularly associated with the title roles in "Lakmé" and "Lucia di Lammermoor".  In addition to appearing as a guest artist with many opera houses internationally, Pons enjoyed a long association with the Metropolitan Opera in New York City, where she performed nearly 300 times between 1931 and 1960. Albin August Heinrich Emil Swoboda (13 November 1836 – 5 August 1901) was an Austrian operatic tenor, actor, and opera director of German birth.  One of the most famous opera singers of the "Golden Age" of Viennese operetta, he was a leading tenor and dramatic stage actor at the Theater an der Wien from 1859-1878.  He notably appeared in the world premieres of operettas by composers Jacques Offenbach, Johann Strauss II, and Franz von Suppé.  He also appeared in musical comedies and plays in Vienna, and appeared in stage productions of all kinds as a guest artist in theatres in Germany, Hungary, Poland, and Russia.  His son Albin Swoboda, Jr. also had a successful career as an opera singer.  In 1955 a street in the Hietzing district of Vienna was named after him. Edgar Vincent (13 March 1918, Hamburg — 26 June 2008, New York City) was an American publicist and actor of German birth.  He began his career appearing in small roles in Hollywood films during the 1940s but his German accent prevented him from moving further with his career.  In 1949 he joined a New York publishing firm with his first client being the opera singer Ezio Pinza.  He went on to specialize in being a publicist for opera singers, helping shape and forward the careers of major stars like Lily Pons, Anna Moffo, Eleanor Steber, Jussi Björling, George London, Leonard Warren, Mirella Freni, Shirley Verrett, Cecilia Bartoli, Dolora Zajick, Dorothy Kirsten, Eileen Farrell, Birgit Nilsson, Rise Stevens and Salvatore Licitra.  He had a particularly close friendship and relationship with the late Beverly Sills and was also a close friend and adviser to Plácido Domingo in addition to being his publicist.  Vincent also worked for Mikhail Baryshnikov and a handful of musicians other than opera singers, including conductors Erich Leinsdorf, Leopold Stokowski and Georg Solti; the cellist Mstislav Rostropovich; and the violinist Isaac Stern.  He also worked frequently with his colleague, fellow publicist Margaret Carson. Aprile Millo (born April 14, 1958) is an American operatic soprano of Italian and Irish ancestry who is particularly admired for her interpretations of the works of Giuseppe Verdi.  Possessing a spinto voice of power, warmth and temperament, Millo became one of the most celebrated opera singers of the late twentieth century.  Although she has performed at many of the world's leading opera houses and with many orchestras and ensembles internationally, Millo has spent much of her career appearing in productions at the Metropolitan Opera. Michael Trimble (sometimes spelled Michael Trimbel) (March 15, 1938, Texarkana, Texas) is an American operatic tenor, voice teacher, and writer on music.  He had an active international career singing leading roles with opera houses during the 1960s and 1970s.  His singing career was cut short due to health concerns, and he has since had an active career as a voice teacher both privately and at the Cleveland Institute of Music, the University of Texas at Austin, and the Aspen Music Festival and School.  Several of his students have had successful international opera careers, including Metropolitan Opera star Tonio di Paolo and soprano Beverly Hoch. Lanfranco Rasponi (11 December 1914 – 9 April 1983) was an Italian author, critic, and publicist.  He is primarily known for his writing on opera and opera singers, especially his 1982 book, "The Last Prima Donnas".  Born in Florence, he was the son of an Italian aristocrat and an American mother.  From the late 1940s to the early 1960s Rasponi was the publicity agent for many opera singers as well as for socialites and fashionable restaurants in New York City.  For a while, he also owned the Sagittarius Gallery in Manhattan which specialised in introducing contemporary European artists.  After a financial scandal in 1963, he left the United States for Italy and dedicated himself to writing.  He spent his last years in Rio de Janeiro where he died at the age of 68. Margaret Carson (July 11, 1911 – October 11, 2007) was an American publicist who was highly influential within the classical music world.  She was a publicist for many important artists during her lengthy career, most notably working closely for several decades with Leonard Bernstein.  She also notably served as the Metropolitan Opera's press director during the tenure of Edward Johnson and into the early portion of Rudolf Bing's career at the Met. " The New York Times" stated that, Carson was "widely regarded as the leading lady of classical music publicists in New York, who guided a generation of singers through the Metropolitan Opera and shepherded the career of Leonard Bernstein." Francia White (1909 - October 22, 1984) was an American soprano who had an active career in concerts, operas, operettas, radio, television, and film during the late 1920s through the 1940s.  She began her career as a vaudeville performer in her late teens and then began singing in more serious classical music repertoire during the mid-1930s.  She drew the attention of Hollywood and began working as a ghost singer for films in 1934.  She soon broke into radio in 1935 and was highly active in that medium until 1941.  On television she starred on the musical variety show, "The Bell Telephone Hour", from 1940-1942.  In addition to her radio work, she is chiefly remembered for helping to launch Edwin Lester's Los Angeles Civic Light Opera in 1938 and was one of their main leading ladies up through 1942.
Answer: Lily Pons