[Roy Mars III]

My top ten would be

10. Harry Lime (Orson Welles) in The Third Man



9. Michelle Pfeiffer's Catwoman



8. The Caller(Kiefer Sutherland) in Phone Booth



7. John Doe (Kevin Spacey) in Se7en



6. Norman Bates (Anthony Perkins) in Psycho



5. Jack Torrance(Jack Nicholson) in 'The Shining'



4. Alex DeLarge(Malcolm McDowell) from A Clockwork Orange




3. Hank Quinlan(Orson Welles) from Touch of Evil



2. Patrick Bateman(Christian Bale) from American Psycho



1. Jack Nicholson's Joker