wow...  very tough to list a top 10...  I feel it could change anytime and as I'm really just discovering a lot of classic directors, my list may not mean much.

In no particular order:

Stanley Kubrick
David Lynch
Francis Ford Coppella
Kirosawa
Sergio Leone
Billy Wilder
Alfred Hitchcock
Francois Traufault
Jeanne Pierre Jeunet
Ingmar Bergman