Suggestions by @seangrant
18,699 suggestions
Peter Sellers
as Gyro Captain in Road Warrior (1971)

Martin Benson
as Gyro Captain in Road Warrior (1971)

James Caan
as Mad Max Rockatansky in Road Warrior (1971)

John Cleese
as Grima Wormtongue in Monty Python and the Lord of the rings

Terry Jones
as Bilbo Baggins in Monty Python and the Lord of the rings

Michael Palin
as Smeagol (gollum) in Monty Python and the Lord of the rings

John Cleese
as Boromir in Monty Python and the Lord of the rings

Michael Palin
as Faramir in Monty Python and the Lord of the rings

Graham Chapman
as Legolas in Monty Python and the Lord of the rings

Terry Gilliam
as Aragorn in Monty Python and the Lord of the rings

Terry Jones
as Gimli in Monty Python and the Lord of the rings

Eric Idle
as Elrond in Monty Python and the Lord of the rings

Graham Chapman
as Sauromon the White in Monty Python and the Lord of the rings

John Cleese
as Gandalf the Grey in Monty Python and the Lord of the rings

Terry Jones
as Pippin Took in Monty Python and the Lord of the rings

Michael Palin
as Merryadoc Brandybuck in Monty Python and the Lord of the rings

Graham Chapman
as Sam Gamgee in Monty Python and the Lord of the rings

Eric Idle
as Frodo Baggins in Monty Python and the Lord of the rings
Daniel Radcliffe
as Weird Al Yankovic in UHF

Paul Gleason
as T-800 in Terminator (1974 cast)