Suggestions by @lordofcheesecakes

James Newton Howard

as Composer in Senlin Ascends

Score: +1

Benedict Cumberbatch

as Commissioner Emmanuel Pound in Senlin Ascends

Score: -1

Eddie Redmayne

as Pliny au Velocitor in Red Rising

Score: +13

Ben Mendelsohn

as General Andreas Eigengrau in Senlin Ascends

Score: 0

Keanu Reeves

as Vasher in Warbreaker

Score: -4

Anthony Daniels

as Wyndle in The Stormlight Archive

Score: +11

Viggo Mortensen

as Marten in The Kingkiller Chronicle

Score: +1

Henry Cavill

as Darrow in Iron Gold

Score: +10

James Earl Jones

as Magnus au Grimmus in Iron Gold

Score: -5

James Earl Jones

as Magnus au Grimmus in Red Rising

Score: -11

Alan Tudyk

as Nightblood in Warbreaker

Score: +8

Bill Hader

as Mickey in Red Rising

Score: -21

Adam Driver

as Trigg ti Nakamura in Red Rising

Score: -23

Andy Serkis

as Finn Goll in Senlin Ascends

Score: +5

Alan Tudyk

as Nightblood (voice) in The Stormlight Archive

Score: -4

John de Lancie

as Odium in The Stormlight Archive

Score: -8