Suggestions by @brendancrowley

Zach Galifianakis

as Alan Garner in The Hangover Part IV

Score: +1

Lin-Manuel Miranda

as Sam Wiggle in The Wiggles (With American actors)

Score: +2

Beatrice Colen

as Etta Candy in Batman Meets Wonder Woman

Score: +1

Lyle Waggoner

as Steve Trevor in Batman Meets Wonder Woman

Score: +1

Fred Gwynne

as Killer Croc in Batman Meets Wonder Woman

Score: +1

Julie Newmar

as Catwoman in Batman Meets Wonder Woman

Score: +1

Malachi Throne

as Clayface in Batman Meets Wonder Woman

Score: +1

Frank Gorshin

as Riddler in Batman Meets Wonder Woman

Score: +1

Cesar Romero

as Joker in Batman Meets Wonder Woman

Score: +1

Otto Preminger

as Mr. Freeze in Batman Meets Wonder Woman

Score: +1

Christopher Lee

as Ra's Al Ghul in Batman Meets Wonder Woman

Score: +2

Lynda Carter

as Wonder Woman in Batman Meets Wonder Woman

Score: +2

Burt Ward

as Robin/Nightwing in Batman Meets Wonder Woman

Score: +1

Yvonne Craig

as Batgirl in Batman Meets Wonder Woman

Score: +1

Alan Napier

as Alfred Pennyworth in Batman Meets Wonder Woman

Score: +1

Adam West

as Batman in Batman Meets Wonder Woman

Score: +2

Tim Roth

as Mad Hatter in Batman: Through The Looking Glass

Score: +1

Bruce Jones

as Writer in Batman: Through The Looking Glass

Score: +1

Giancarlo Esposito

as Hugo Strange in The batman 2: Heart of ice

Score: +1

Jeff Goldblum

as Jonathan crane in Tim burtons: batman and robin

Score: 0