Question: Who first worked in Hollywood during the transition to "talkies", from 1926 to 1930, Michael Herz or Alexander Korda ?

Context articles: Zoltan Korda
Harrison and Barrison
Peter Ellenshaw
Alexander Korda
Chris Korda
Michael Herz (producer)
Strange Evidence
Korda Studios
The Lion Has Wings
Madame Wants No Children

Zoltan Korda (June 3, 1895 – October 13, 1961) was a Hungarian-born motion picture screenwriter, director and producer.
 He made his first film in Hungary in 1918, and worked with his brother Alexander Korda on film-making there and in London.
 They both moved to the United States in 1940 to Hollywood and the American film industry.
Harrison and Barrison (Hungarian: Harrison és Barrison) is a 1917 Hungarian silent comedy film directed by Alexander Korda and starring Márton Rátkai, Dezsõ Gyárfás and Nusi Somogyi.
 Korda broke from his previous practice of adapting literary works, to direct an original screenplay.
 The film's style is a madcap one, which relied on the talents of its two stars Rátkai and Gyárfás who were popular comedians.
 It was Korda's most famous Hungarian film, better known than his literary adaptions.
 Korda himself considered the film his best work of the period.
His first worked in matte painting for producer Alexander Korda on such films as "Things to Come" (1936), and later on such Powell and Pressburger productions as "Black Narcissus" (1947) assisting his mentor W. (Walter) Percy Day.
 A few years later, while still based in Europe, he began to work for Hollywood studios.
 He worked for MGM on "Quo Vadis" (1951), but his most extensive association was with Walt Disney Studios beginning with their first completely live action feature film, "Treasure Island" (1950).
 He went on to work on "20,000 Leagues Under the Sea" (1954) and "Mary Poppins" (1964), for which he won an Academy Award.
 He retired after his work on "The Black Hole" (1979), but contributed matte paintings for "Dick Tracy" (1990).
 His son Harrison is also an Academy Award-winning effects designer.
Sir Alexander Korda (born Sándor László Kellner, 16 September 1893 – 23 January 1956) was a Hungarian-born British film producer and director.
 He first worked in Hollywood during the transition to "talkies", from 1926 to 1930.
 The change led to divorce from his first wife, popular Hungarian actress María Corda, who could not make the transition because of her strong accent in English.
Chris Korda (born 1962) is a US antinatalist activist, techno musician and software developer, and leader of the Church of Euthanasia.
 Korda is a transgender vegan and the great-niece of Hungarian-born film magnate Sir Alexander Korda, who was very prominent in the British film industry, as he was the founder of London Films and the owner of British Lion Films.
 Korda is the only child of prominent writer and novelist Michael Korda, former editor-in-chief at Simon & Schuster in New York.
Michael Herz is an American film producer, director and screenwriter.
 With Lloyd Kaufman, the two are the co-founders of Troma Entertainment, the world's longest running independent film studio, known for their comedic horror films, including the cult favorite "Toxic Avenger series and "Tromeo and Juliet".
Strange Evidence (also known as "Dance of the Witches", and "Wife in Pawn" ) is a 1933 U.K crime film directed by Robert Milton, produced by Alexander Korda and written by Lajos Bíró and Miles Malleson.
 Starring Leslie Banks, George Curzon, Carol Goodner and Frank Vosper, it is a film made by Alexander Korda's London Film Productions at British and Dominions Imperial Studios, Elstree with art direction by R.Holmes Paul.
Korda Studios (in Hungarian: "Korda Filmstúdió") is a new film studio complex 26 km west of Budapest in the wine-making village of Etyek; hence the media nickname "Etyekwood".
 It is built on the site of a former barracks.
 The studio is named after Sir Alexander Korda.
 There was a former "Korda Studios" in London until c1980 (see Abbey Road Studios).
The Lion Has Wings is a 1939 British, black-and-white, documentary-style, propaganda war film.
 The film was directed by Adrian Brunel, Brian Desmond Hurst, Alexander Korda and Michael Powell.
 It was produced by London Film Productions and Alexander Korda Film Productions.
Madame Wants No Children (German: "Madame wünscht keine Kinder" ) is a 1926 German silent drama film directed by Alexander Korda and starring María Corda, Harry Liedtke and Maria Paudler.
 It is based on the novel "Madame ne veut pas d'enfants" by the French writer Clément Vautel.
 The film was made for the American Fox Film Corporation's German subsidiary.
 The film was shot at Tempelhof Studios in late 1926.
 It was the last film European film Korda made until 1930 as he left for the United States shortly after its production (although an earlier film, "A Modern Dubarry", premiered later).