Suggestions by @benjombunud

Will Ferrell

as Lord/President Business (voice) in The LEGO Dimensions Movie

Amanda Seyfried

as Harley Quinn in The Dark Knight (TV Series)

Ian McKellen

as Valka’s Bewilderbeast in How to Train Your Dragon

Scarlett Johansson

as The Light Fury in How to Train Your Dragon

Frank Welker

as Red Death in How to Train Your Dragon

Tara Strong

as Stormfly in How to Train Your Dragon

Hugh Jackman

as Hookfang in How to Train Your Dragon

Tara Strong

as Catwoman in An Original DC Animated Fan Cast

Nicky Jones

as Chowder in YouTube Poop

Chris Pine

as Homelander in The Boys

Dante Basco

as Dante Basco in Robin

Christopher Nolan

as Director in The Dark Knight (TV Series)

Logan Lerman

as Red Robin in The Dark Knight (TV Series)

Dylan O'Brien

as Red Hood in The Dark Knight (TV Series)

Hans Zimmer

as Composer in The Dark Knight (TV Series)

Michael C. Hall

as Hush in The Dark Knight (TV Series)

Anthony Ingruber

as Joker in The Dark Knight (TV Series)

Evan Peters

as Joker in The Dark Knight (TV Series)

Heath Ledger

as Joker in The Dark Knight (TV Series)

Gary Oldman

as James Gordon in The Dark Knight (TV Series)