Suggestions by @blanepollino

Corey Stoll

as Horus Lupercal in Warhammer 40K

Score: +1

Sterling K. Brown

as Magnus the Red in Warhammer 40K

Score: 0

Andy Serkis

as Mortarion in Warhammer 40K

Score: +3

Chris Evans

as Roboute Guilliman in Warhammer 40K

Score: +2

Tom Hardy

as Angron in Warhammer 40K

Score: +2

Jon Bernthal

as Ferrus Manus in Warhammer 40K

Score: +2

Bradley Cooper

as Sanguinius in Warhammer 40K

Score: +2

Tom Hiddleston

as Konrad Curze in Warhammer 40K

Score: 0

Tadanobu Asano

as Jaghatai Khan in Warhammer 40K

Score: +2

Josh Brolin

as Rogal Dorn in Warhammer 40K

Score: +2

Chris Hemsworth

as Leman Russ in Warhammer 40K

Score: +1

Simu Liu

as Jaghatai Khan in Warhammer 40K

Score: -2

Vincent D'Onofrio

as Perturabo in Warhammer 40K

Score: +3

Lee Pace

as Fulgrim in Warhammer 40K

Score: +3

Karl Urban

as Lion El'Johnson in Warhammer 40K

Score: +2

Ana de Armas

as The Perpetual Erda in Warhammer 40K

Score: +3

Henry Cavill

as The Emperor of Mankind in Warhammer 40K

Score: +5