Suggestions by @camisade

Keith David

as Darunia in The Legend of Zelda

Score: -1

Dave Fennoy

as Darunia in The Legend of Zelda

Score: -2

Liam O'Brien

as Kelex in Superman

Score: +1

Chiaki Kuriyama

as Delphine Courtney in Alpha Flight

Score: +1

Nuufolau Joel Seanoa

as Scraphook in The Transformers

Score: +1

Josh Petersdorf

as Scraphook in The Transformers

Score: +1

Kath Soucie

as Blackarachnia in The Transformers

Score: -2

Sung Kang

as Drift in The Transformers

Score: 0

Michael Chiklis

as Dampé in The Legend of Zelda

Score: +2

Ron Perlman

as Azzael in Hellboy

Score: +1

Jason Flemyng

as Jeremiah Witkins in Hellboy

Score: +2

Brett Dalton

as Max Payne in Max Payne

Score: -1

Martin Freeman

as Roger Huntoon in Animal Man

Score: +1

Jess McLeod

as Heather McNeil-Hudson in Alpha Flight

Score: +1

Mckenna Grace

as April O'Neil in Teenage Mutant Ninja Turtles

Score: +2

Brittany Ishibashi

as Windblade in The Transformers

Score: +2

Bill Nighy

as The Great Deku Tree in The Legend of Zelda

Score: +1

Martin Starr

as Maes Hughes in Fullmetal Alchemist

Score: +4

Kenneth Branagh

as Eddie the Computer in The Hitchhiker's Guide to the Galaxy

Score: +1

Danny Huston

as Gilbert Taylor in I've Got a Bad Feeling About This

Score: +3