No one. Those who have been nominated for all three awards (sometimes for the same movie), have never won all three. Woody Allen and Clint Eastwood have never won as actors. Roberto Benigni hasn't won as a screenwriter. Warren Beatty only won as a director. George Clooney only won for acting so far. Orson Welles and John Huston won for Screenwriting. Kenneth Branagh has yet to win any Oscar. Charlie Chaplin never won an Oscar (he received one, but never won as actor, director or screenwriter). John Cassavetes was 0 for 3 (he was nominated as actor, director and screenwriter once, each time for a different movie). And that's about it.
Billy Wilder
Viva Villa! won the Oscar for Assistant Director in 1934.
In grand total, for his entire career? Zero. He did get a lifetime achievement Oscar soon before his death.
The Lives of a Bengal Lancer won the Oscar for Assistant Director in 1935.
Sydney Pollack won the Oscar for Best Director for the film Out of Africa.
rabindra nath tagoreSatyajit Ray
Billy Wilder
any actor, director, writer or anything of that sort is eligible to win; if he /she did an outstanding job
A career that Oscar Goldsmith never attempted before was a teacher. He had attempted medicine and law before becoming a writer.
In Old Chicago won the Oscar for Assistant Director in 1937.
Viva Villa! won the Oscar for Assistant Director in 1934.
In grand total, for his entire career? Zero. He did get a lifetime achievement Oscar soon before his death.
The Lives of a Bengal Lancer won the Oscar for Assistant Director in 1935.
James Cameron won the Oscar for Best Director for Titanic (1997).
Charles Barton (Paramount) won the Oscar for Assistant Director in 1932.
The Charge of the Light Brigade won the Oscar for Assistant Director in 1936.
Sydney Pollack won the Oscar for Best Director for the film Out of Africa.