Just for completeness:

IMDb top rated:

1. The Godfather (1972)
2. The Godfather: Part II (1974)
3. One Flew Over the Cuckoo's Nest (1975)
4. Star Wars (1977)
5. Apocalypse Now (1979)
6. Taxi Driver (1976)
7. Alien (1979)
8. Chinatown (1974)
9. A Clockwork Orange (1971)
10. Monty Python and the Holy Grail (1975)

Highest US box office:

1. Star Wars (1977)
2. Jaws (1975)
3. The Exorcist (1973)
4. Grease (1978)
5. The Sting (1973)
6. Animal House (1978)
7. The Rocky Horror Picture Show (1975)
8. The Godfather (1972)
9. Superman (1978)
10. Close Encounters of the Third Kind (1977)