2024 - "Oppenheimer"
2023 - "Everything Everywhere All at Once"
2022 - "CODA"
2021 - "Nomadland"
2020 - "Parasite"
2019 - "Green Book"
2018 - "The Shape of Water"
2017 - "Moonlight"
2016 - "Spotlight"
2015 - "Birdman"
2014 - "12 Years a Slave"
2013 - "Argo"
2012 - "The Artist"
2011 - "The King's Speech"
2010 - "The Hurt Locker"
2009 - "Slumdog Millionaire"
2008 - "No Country for Old Men"
2007 - "The Departed"
2006 - "Crash"
2005 - "Million Dollar Baby"
2004 - "The Lord of the Rings: The Return of the King"
2003 - "Chicago"
2002 - "A Beautiful Mind"
2001 - "Gladiator"
2000 - "American Beauty"
1999 - "Shakespeare in Love"
1998 - "Titanic"
1997 - "The English Patient"
1996 - "Braveheart"
1995 - "Forrest Gump"
1994 - "Schindler’s List"
1993 - "Unforgiven"
1992 - "The Silence of the Lambs"
1991 - "Dances With Wolves"
1990 - "Driving Miss Daisy"
1989 - "Rain Man"
1988 - "The Last Emperor"
1987 - "Platoon"
1986 - "Out of Africa"
1985 - "Amadeus"
1984 - "Terms of Endearment"
1983 - "Gandhi"
1982 - "Chariots of Fire"
1981 - "Ordinary People"
1980 - "Kramer vs. Kramer"
1979 - "The Deer Hunter"
1978 - "Annie Hall"
1977 - "Rocky"
1976 - "One Flew over the Cuckoo's Nest"
1975 - "The Godfather Part II"
1974 - "The Sting"
1973 - "The Godfather"
1972 - "The French Connection"
1971 - "Patton"
1970 - "Midnight Cowboy"
1969 - "Oliver!"
1968 - "In the Heat of the Night"
1967 - "A Man for All Seasons"
1966 - "The Sound of Music"
1965 - "My Fair Lady"
1964 - "Tom Jones"
1963 - "Lawrence of Arabia"
1962 - "West Side Story"
1961 - "The Apartment"
1960 - "Ben-Hur"
1959 - "Gigi"
1958 - "The Bridge on the River Kwai"
1957 - "Around the World in 80 Days"
1956 - "Marty"
1955 - "On the Waterfront"
1954 - "From Here to Eternity"
1953 - "The Greatest Show on Earth"
1952 - "An American in Paris"
1951 - "All About Eve"
1950 - "All the Kings Men"
1949 - "Hamlet"
1948 - "Gentleman's Agreement"
1947 - "The Best Years of Our Lives"
1946 - "The Lost Weekend"
1945 - "Going My Way"
1944 - "Casablanca"
1943 - "Mrs. Miniver"
1942 - "How Green Was My Valley"
1941 - "Rebecca"
1940 - "Gone with the Wind"
1939 - "You Can't Take It with You"
1938 - "The Life of Emile Zola"
1937 - "The Great Ziegfeld"
1936 - "Mutiny on the Bounty"
1935 - "It Happened One Night"
1933/1934 - "Cavalcade"
1932/1933 - "Grand Hotel"
1931/1932 - "Cimarron"
1930/1931 - "All Quiet on the Western Front"
1929/1930 - "The Broadway Melody"
1928/1929 - "Wings"

I've seen 46. Most recent is Oppenheimer, oldest is Casablanca.