Actress

1927-28 
Who won: Janet Gaynor in 7th Heaven, Street Angel, and Sunrise

1928-29
Who won: Mary Pickford in Coquette 
Who should have won: Jeanne Eagels in The Letter 

1929-30
Who won: Norma Shearer in The Divorcee
Who should have won: Nina Mae McKinney in Hallelujah

1930-31
Who won: Marie Dressler in Min and Bill 

1931-32 
Who won: Helen Hayes in The Sin of Madelon Claudet 
Who should have won: Joan Crawford in Grand Hotel 

1932-33
Who won: Katharine Hepburn in Morning Glory 
Who should have won: Katharine Hepburn in Little Women 

1934
Who won: Claudette Colbert in It Happened One Night
Who should have won: Bette Davis in Of Human Bondage 

1935
Who won: Bette Davis in Dangerous 
Who should have won: Katharine Hepburn in Alice Adams

1936 
Who won: Luise Rainer in The Great Ziegfeld
Who should have won: Carole Lombard in My Man Godfrey

1937 
Who won: Luise Rainer in The Good Earth 
Who should have won: Greta Garbo in Camille 

1938 
Who won: Bette Davis in Jezebel 

1939 
Who won: Vivien Leigh in Gone With the Wind  

1940 
Who won: Ginger Rogers in Kitty Foyle 
Who should have won: Katharine Hepburn in The Philadelphia Story 

1941 
Who won: Joan Fontaine in Suspicion 
Who should have won: Barbara Stanwyck in The Lady Eve 

1942 
Who won: Greer Garson in Mrs. Miniver
Who should have won: Bette Davis in Now, Voyager

1943 
Who won: Jennifer Jones in The Song of Bernadette
Who should have won: Jean Arthur in The More the Merrier

1944 
Who won: Ingrid Bergman in Gaslight 
Who should have won: Barbara Stanwyck in Double Indemnity 

1945 
Who won: Joan Crawford in Mildred Pierce

1946 
Who won: Olivia de Havilland in To Each His Own
Who should have won: Anna Magnani in Open City

1947 
Who won: Loretta Young in The Farmer's Daughter
Who should have won: Jane Greer in Out of the Past

1948 
Who won: Jane Wyman in Johnny Belinda

1949 
Who won: Olivia de Havilland in The Heiress