For me:

Stanley Kubrick (favorite film: 2001: A SPACE ODYSSEY)
Louis Malle (favorite film: MURMUR OF THE HEART)
David Lynch (favorite film: MULHOLLAND DRIVE)
Roman Polanski (favorite film: ROSEMARY'S BABY)
Gus Van Sant (favorite film: GERRY)
Alfred Hitchcock (favorite film: VERTIGO)
Terrence Malick (favorite film: BADLANDS)
Pier Paolo Pasolini (favorite film: SALO, OR THE 120 DAYS OF SODOM)
Sidney Lumet (favorite film: RUNNING ON EMPTY)
Nicolas Roeg (favorite film: DON'T LOOK NOW)

You?

In no order..

Quentin Tarantino
Joel Coen
Alfred Hitchcock
Martin Scorsese
Roman Polanski
Hayao Miyazaki
John Carpenter
Steven Spielberg
Oliver Stone
Milos Forman

It hurts so bad that I left off Scorsese.

Chaplin and Jeunet. :D

martin scorsese......oliver stone.......paul thomas anderson.......david mamet.......michael mann.....sydney lumet......ridley scott......spike lee......quinton tarantino.......christopher nolan

I'll take a shot at this...

Darren Aronofsky
Kevin Smith
Woody Allen
Quentin Tarantino
Richard Linklater
Martin Scorsese
Mike Binder
Paul Thomas Anderson
Steven Spielberg
David Fincher

Martin Scorsese
Steven Spielberg
Quentin Tarantino
Darren Aronofsky
David Fincher
Clint Eastwood
Peter Jackson
Woody Allen
Sam Mendes
Christopher Nolan

in no specific order:

Alfred Hitchcock (Psycho)
Federico Fellini (La Dolce Vita)
Stanley Kubrick (2001: A Space Odyssey)
Akira Kurosawa (The Seven Samurai)
Charles Chaplin (Modern Times)
F.W. Murnau (Sunrise)
Robert Altman (MASH)
Jean-Luc Goddard (Breathless)
Satyajit Ray (Pather Panchali)
Ingmar Bergman (The Seventh Seal)

Honorable Mention: Francois Truffaut (The 400 Blows), David Lynch (Eraserhead), Vittorio De Sica (The Bicycle Thief), Sergei Eisenstein (Battleship Potemkin), D.W. Griffith (The Birth of a Nation)