For which film did Denzel Washington win the Oscar for Best Actor?

For which film did Kevin Spacey win the Oscar for Best Actor? Who won the Oscar for Best Actor for 'Gladiator'? For which film did Russell Crowe win the Oscar for Best Actor? Who won the Oscar for Best Actor for 'Training Day'? Who won the Oscar for Best Actor for 'The Pianist'? Who won the Oscar for Best Actor for 'Mystic River'? Who won the Oscar for Best Actor for 'Ray'? For which film did Jamie Foxx win the Oscar for Best Actor?