These are consistently my all-time favorites:
Amadeus (1984)
The Good, the Bad, and the Ugly (1966)
Wrath of Khan (1982)
Star Wars (1977)
The Graduate (1967)
Can also add:
The Great Silence (1968)
The Odd Couple (1968)
Days of Wine and Roses (1962)
I like the 60s.