Suggestions by @kaioscott

Christopher Lee

as Durandarte in The King Stag

Score: +1

David Tennant

as Tartaglia in The King Stag

Score: +1

Cary Elwes

as Deramo in The King Stag

Score: 0

Conleth Hill

as Trusty John in Fables

Score: +1

Russell Crowe

as The Huntsman in Snow White Disney Remake

Score: -3

Paul Bettany

as Melvin Van Horne in The Simpsons

Score: +2

Brad Dourif

as Micah Bell in Red Dead Redemption

Score: -3

Liam Neeson

as Asgore Dreemurr in Undertale

Score: +2

Roger Clark

as Arthur Morgan in Red Dead Redemption

Score: +6

Ian McDiarmid

as Magic Mirror in Snow White Disney Remake

Score: +1

Warwick Davis

as Sleepy in Snow White Disney Remake

Score: +1

Peter Dinklage

as Doc in Snow White Disney Remake

Score: +1

Anderson Cooper

as Kent Brockman in The Simpsons

Score: +4

Josh Holloway

as Jack Horner in Fables

Score: 0

Wilford Brimley

as Old King Cole in Fables

Score: +1

Christopher Lee

as Geppetto in Fables

Score: +3

Tom Hardy

as Arthur Morgan in Red Dead Redemption

Score: +16

Rory McCann

as Woody in Fables

Score: +1