The only 2 leading roles awards that can be won at the Academy Awards are Best Actor and Best Actress. In 1943 the winners of the awards were James Cagney and Geer Garson, respectively. Cagney for his role Yankee Doodle Dandy and Garson for her role in Mrs. Miniver.
Humphrey Bogart, Casablanca Gary Coooper, To Whom the Bells Toll * Paul Lukas, Watch on the Rhine Walter Pidgeon, Madame Curie Mickey Rooney, The Human Comedy
The Academy Award winner for Best Actor in 1943 was Paul Lukas in the movie "Watch on the Rhine"
Art Carney won the Oscar for Best Actor in a Leading Role in 1974.
Colin Firth won the Oscar for Best Actor in a Leading Role in 2010.
Rex Harrison won the Oscar for Best Actor in a Leading Role in 1964.
Alec Guinness won the Oscar for Best Actor in a Leading Role in 1957.
Spencer Tracy won the Oscar for Best Actor in a Leading Role in 1937.
Paul Lukas won the Oscar for Best Actor in a Leading Role in 1943.
Nominated Oscar Best Actor in a Leading Role for: Wag the Dog (1997)Won Oscar Best Actor in a Leading Role for: Rain Man (1988)Nominated Oscar Best Actor in a Leading Role for: Tootsie (1982)Won Oscar Best Actor in a Leading Role for: Kramer vs. Kramer (1979)Nominated Oscar Best Actor in a Leading Role for: Lenny (1974)Nominated Oscar Best Actor in a Leading Role for: Midnight Cowboy (1969)Nominated Oscar Best Actor in a Leading Role for: The Graduate (1967)
Art Carney won the Oscar for Best Actor in a Leading Role in 1974.
Al Pacino won the Oscar for Best Actor in a Leading Role in 1992.
Charles Coburn won the Oscar for Best Actor in a Supporting Role in 1943.
Colin Firth won the Oscar for Best Actor in a Leading Role in 2010.
Geoffrey Rush won the Oscar for Best Actor in a Leading Role in 1996.
Ben Kingsley won the Oscar for Best Actor in a Leading Role in 1982.
Rex Harrison won the Oscar for Best Actor in a Leading Role in 1964.
Bing Crosby won the Oscar for Best Actor in a Leading Role in 1944.
Broderick Crawford won the Oscar for Best Actor in a Leading Role in 1949.
Burt Lancaster won the Oscar for Best Actor in a Leading Role in 1960.