Here are a few.
1966, Best Actor, take away Paul Scofield, give to Richard Burton “Who’s Afraid of Virginia Wolfe”
1968, Best Actress, take away Barbra Streisand and Kathrine Hepburn, give to Mia Farrow “Rosemary’s Baby”
1969, Best Actor, take away John Wayne, give to Jon Voight “Midnight Cowboy”
1972, Best Actress, take away Liza Minnelli, give to Diana Ross “Lady Sings the Blues”
1973, Best Actress, take away Glenda Jackson, give to Ellyn Burstyn “The Exorcist”
1974, Best Actor, take away Art Carney, give to Al Pacino “The Godfather II”
1977, Best Actor, take away Richard Dryfuss, give to John Travolta “Saturday Night Fever”
1983, Best Actress, take away Shirley McClaine, give to Debra Winger “Terms of Endearment”
1987, Best Actress, take away Cher, give to Glenn Close “Fatal Attraction”
1992, Best Actor, take away Al Pacino, give to Denzel Washington “Malcolm X”
2000, Best Actress, take away Julia Roberts, give to Laura Linley, “You Can Count On Me”
2001 Best Actor, take away Denzel Washington, give to Russell Crowe, “Beautiful