Suggestions by @seanwhelanwhelan

Keanu Reeves

as Bruce Wayne/Batman in Batman Begins (1995)

Ernest Borgnine

as Oswald Cobblepott/The Penguin in Batman (1970s)

Peter Falk

as Jervis Tech/Mad Hatter in Batman (1970s)

Roddy McDowall

as Jervis Tech/Mad Hatter in Batman (1970s)

Dudley Moore

as Jervis Tech/Mad Hatter in Batman (1970s)

Tom Bosley

as Harvey Bullock in Batman (1970s)

Ed Asner

as Harvey Bullock in Batman (1970s)

John Belushi

as Harvey Bullock in Batman (1970s)

Telly Savalas

as Victor Fries/Mr. Freeze in Batman (1970s)

Yul Brynner

as Victor Fries/Mr. Freeze in Batman (1970s)

Eli Wallach

as Victor Fries/Mr. Freeze in Batman (1970s)

Harry Hamlin

as Bane in Batman (1970s)

Arnold Schwarzenegger

as Bane in Batman (1970s)

Richard Kiel

as Bane in Batman (1970s)

Vincent Price

as Hugo Strange in Batman (1970s)

Donald Pleasence

as Hugo Strange in Batman (1970s)

Max von Sydow

as Ra's Al Ghul in Batman (1970s)

Christopher Lee

as Ra's Al Ghul in Batman (1970s)

Robby Benson

as Dick Grayson/Robin in Batman (1970s)

Jeff Bridges

as Dick Grayson/Robin in Batman (1970s)