My top 20 in no particular order. I include a leading actor to refresh your memories. You've probably seen most of these movies already.
1. When Harry Met Sally (Billy Crystal)
2. Groundhog Day (Bill Murray)
3. The English Patient (Ralph Fiennes)
4. The Shining (Jack Nicholson)
5. The Godfather (Marlon Brando)
6. Back to the Future (Michael J Fox)
7. Four Weddings and a Funeral (Hugh Grant)
8. Dances with Wolves (Kevin Costner)
9. Fatal Attraction (Glenn Close)
10. Ghost (Patrick Swayze)
11. Little Shop of Horrors (Rick Moranis)
12. The Man with Two Brains (Steve Martin)
13. The Sound of Music (Julie Andrews)
14. Trading Places (Eddie Murphy)
15. An Officer and a Gentleman (Richard Gere)
16. The Silence of the lambs (Anthony Hopkins)
17. The Edge (Anthony Hopkins)
18. Witness (Harrison Ford)
19. What Lies Beneath (Harrison Ford)
20. Someone To Watch Over Me (Tom Berenger)