Suggestions by @alexblagovo23

Willem Dafoe

as Aku in Samurai Jack: The Scotsman (live movie)

Score: +1

Keanu Reeves

as Samurai Jack in Samurai Jack: The Scotsman (live movie)

Score: +1

Dave Bautista

as The Scotsman in Samurai Jack: The Scotsman (live movie)

Score: +1

Ryan Reynolds

as Johnny bravo in Johnny bravo

Score: +1

Lyubomir Neikov

as Peter Griffin in Family Guy

Score: 0

Margot Robbie

as Dee Dee in Dexter Laboratory (Live Action)

Score: 0

Jonah Hill

as Dexter in Dexter Laboratory (Live Action)

Score: -2

Doris Roberts

as Muriel Bagge in Courage the Cowardly Dog

Score: +1

Peter Boyle

as Eustace Bagge in Courage the Cowardly Dog

Score: 0