Greatest portrayal of Batman?

Similar to my thread on Supes. Here are your options and where they first appeared:



Lewis G. Wilson - Batman (1943)

Robert Lowery - Batman & Robin (1949)

Adam West - Batman: The Movie (1966)

Michael Keaton - Batman (1989)

Val Kilmer - Batman Forever (1995)

George Clooney - Batman & Robin (1997)

Christian Bale - Batman Begins (2005)