Suggestions by @sam2020

John Cena

as Diamondhead in Ben 10: Race Against Time (Animated Version)

Jimmy Coup

as Composer in Ben 10: Race Against Time (Animated Version)

James Arnold Taylor

as Eon in Ben 10: Race Against Time (Animated Version)

Bruce Campbell

as Eon in Ben 10: Race Against Time (Animated Version)

Bruce Campbell

as Eon (Ben) in Ben 10: Race Against Time (Animated Version)

Adam Driver

as Diamondhead in Ben 10: Race Against Time (Animated Version)

Dave Bautista

as Diamondhead in Ben 10: Race Against Time (Animated Version)

Dwayne Johnson

as Diamondhead in Ben 10: Race Against Time (Animated Version)

Trampas Thompson

as Bellwood Sheriff 2 in Ben 10: Race Against Time (Animated Version)

Joey Box

as Bellwood Sheriff 1 in Ben 10: Race Against Time (Animated Version)

Finn Wolfhard

as Ben Tennyson in Ben 10: Race Against Time (Animated Version)

Alec Guinness

as Grandpa Max Tennyson in Ben 10: Race Against Time (Animated Version)

Harrison Ford

as Grandpa Max Tennyson in Ben 10: Race Against Time (Animated Version)

Willem Dafoe

as Thaddeus J. Collins in Ben 10 (Live Action tv show)

Juan Pablo Medina

as Mr.Green in Ben 10 (Live Action tv show)

Steve Buscemi

as Ditto in Ben 10 (Live Action tv show)

Tara Strong

as Sandra Tennyson in Ben 10: Race Against Time (Animated Version)

Dee Bradley Baker

as Carl Tennyson in Ben 10: Race Against Time (Animated Version)

Matthew Wood

as Bivalvan in Ben 10

Alistair Petrie

as Norman Osborn in The Spectacular Spider-Man