Suggestions by @swk1690

Michael Dorn

as Ben Grimm in The Fantastic Four

Score: +1

Robert Joy

as The Ventriloquist in Batman Film Series

Score: -1

Michael Dorn

as Ben Grimm in Chris Columbus' Fantastic Four (2005)

Score: 0

Ray Winstone

as Wilson Fisk in The Ramiverse

Score: +1

Jason Statham

as Electro in The Ramiverse

Score: 0

Patrick Stewart

as Mr Freeze in Batman: Unchained (2000)

Score: +3

Robin Williams

as Riddler in Batman: Unchained (2000)

Score: +3

Billy Dee Williams

as Two Face in Batman: Unchained (2000)

Score: +4

Robin Williams

as The Riddler in Batman Triumphant (1999)

Score: 0

Gates McFadden

as Poison Ivy in Batman Triumphant (1999)

Score: -2

Gates McFadden

as Poison Ivy in Batman: Unchained (2000)

Score: 0

Gates McFadden

as Poison Ivy in Batman (1989)

Score: -1

Thomas Dekker

as Tim Drake in Batman

Score: -7

Jason Behr

as Dick Grayson in Nolanverse

Score: +1

Drew Barrymore

as Medusa in The Fantastic Four

Score: -10

Rose McGowan

as Pamela Isley in Nolanverse

Score: -3

Sam Raimi

as Director in Batman/Spider-Man (2008)

Score: +3

Jennifer Hale

as Giganta / Doris Zuel in Wonder Woman The Animated Series

Score: +1