Suggestions by @ faisalalrasheed

Albert Brooks

as Old Salt in Fishing Village in Cabin Boy (2004)

Alec Baldwin

as Old Salt in Fishing Village in Cabin Boy (2004)

Jon Stewart

as Old Salt in Fishing Village in Cabin Boy (2004)

Richard Kind

as Skunk in Cabin Boy (2004)

Michael McShane

as Captain Greybar in Cabin Boy (2004)

Julia Louis-Dreyfus

as Mom in Dexter's Laboratory (1999 live-action movie)

+3-0Score: +3

Brendan Fraser

as Vallhalen in Dexter's Laboratory (1999 live-action movie)

Hugh Laurie

as Dad in Dexter's Laboratory (1999 live-action movie)

Ryan Stiles

as Dad in Dexter's Laboratory (1999 live-action movie)

+3-0Score: +3

Federico Fellini

as Director in The Wonderful Ice Cream Suit (1987)

Ray Bradbury

as Writer in The Wonderful Ice Cream Suit (1987)

Paul Weiland

as Director in Dexter's Laboratory (1999 live-action movie)

Bug Hall

as Mandark in Dexter's Laboratory (1999 live-action movie)

+2-0Score: +2

Bradley Pierce

as Mandark in Dexter's Laboratory (1999 live-action movie)

Wayne Knight

as Mr. Luzinsky in Dexter's Laboratory (1999 live-action movie)

Josh Mostel

as Mr. Luzinsky in Dexter's Laboratory (1999 live-action movie)

Alec Baldwin

as Dad in Dexter's Laboratory (1999 live-action movie)

+1-2Score: -1

Stephen Hibbert

as Writer in Dexter's Laboratory (1999 live-action movie)

Jay Kogen

as Writer in Dexter's Laboratory (1999 live-action movie)