Just a few off the top of my (pointy) head:
1. Out of the Past (1947) Robert Mitchum, Kirk Douglas
2. Thirteen Days (2000) Kevin Costner
3. Road To Perdition (2002) Tom Hanks
4. The FBI Story (1959) James Stewart
5. Guide For the Married Man (1967) Walter Matthau
6. Sweet Smell of Success (1957) Tony Curtis, Burt Lancaster
7. Chinatown (1974) Jack Nicholson, Faye Dunaway
8. Farewell, My Lovely (1975) Robert Mitchum
9. Dead Reckoning (1947) Humphrey Bogart
10. In a Lonely Place (1950) Humphrey Bogart
11. The Thin Man films (all of 'em!) (1934-47) William Powell & Myrna Loy
12. Mutiny On the Bounty (1962) Marlon Brando, Trevor Howard
13. The Bachelor & the Bobby-Soxer (1947) Cary Grant, Myrna Loy
14. The Best Years of Our Lives (1946) Frederic March, Myrna Loy, Dana Andrews
15. The Human Comedy (1943) Mickey Rooney, Van Johnson
16. The Nutty Professor (1963) Jerry Lewis
17. Strategic Air Command (1955) James Stewart, June Allyson
18. The Aviator (2004) Leonardo DiCaprio, Cate Blanchett
19. Papillon (1973) Steve McQueen, Dustin Hoffman
20. L.A. Confidential (1997) Russell Crowe, Guy Pearce