Oh there are numerous actors and actress that have deserved this honor in the past! I can't begin to name them all! And I won't repeat the ones you all have mentioned. (But I do LOVE me some Denezel, I still need to see Training Day though!)
However, I must put in a plug for SGRho.....
Soror Hattie McDaniel was the first Black women to win Best Supporting Actress for her role in "Gone with the Wind."
PS: J-Low's outfit was a big discussion at my job on Monday! I need to hear the comments on E! My friend said there was a joke that the after party was held in her hair...LOL...