Best Supporting Actress
Won for: Mammy, Gone with the Wind (1939)
Unfortunately, it's well known that during McDaniel's time, the few acting opportunities available to blacks were minor roles as servants. By the time McDaniel won the Oscar in 1939, she had played a maid, cook or servant in over 30 films.
Won for: Oda Mae Brown, Ghost (1990)
Should have won for: Celie, The Color Purple (1985). She was actually nominated in the Best Actress category, an award that film critic Roger Ebert predicted she would win. Instead, the Oscar went to Geraldine Page for The Trip to Bountiful. Out of The Color Purple's 11 Academy Award nominations, the film didn't win any.
Won for: Effie White, Dreamgirls (2006)
We can't make a comparison here, since Dreamgirls was Hudson's debut film. There was also much chagrin about the former American Idol contestant beating out actresses like Little Miss Sunshine's Abigail Breslin and Cate Blanchett in Notes on a Scandal. Still, Hudson's soul singing, soul-stirring performance as girl group member Effie White was strong enough to earn her the Oscar, Golden Globe, BAFTA, Image Award, and SAG Award in 2006.