Suggestions by @alit14

Rosario Dawson

as Amara in The Codex Alera

Score: +1

Denzel Washington

as John Marcone in The Dresden Files

Score: -17

Jason Momoa

as Doroga in The Codex Alera

Score: +2

Daniel Radcliffe

as Ehren in The Codex Alera

Score: +2

Nikolaj Coster-Waldau

as Attis Aquataine in The Codex Alera

Score: +2

Matt Bomer

as Septamis in The Codex Alera

Score: +2

Timothée Chalamet

as Tavi in The Codex Alera

Score: +1

Charlize Theron

as Lady Aquataine in The Codex Alera

Score: +2

Mark Strong

as Fedelias in The Codex Alera

Score: +1

Rami Malek

as Relg in The Belgariad

Score: +10

Kristofer Hivju

as Barak in The Belgariad

Score: +14

Simon Helberg

as Silk in The Belgariad

Score: +6

Famke Janssen

as Queen Salmissra of Nyissa in The Belgariad

Score: +5

Stephanie Beatriz

as Susan Rodriquez in The Dresden Files

Score: +2

Norm Lewis

as Morgan in The Dresden Files

Score: -12

Idris Elba

as John Marcone in The Dresden Files

Score: -17