Suggestions by @samtoore

Julia Garner

as Shalla-Bal in The Silver Surfer

Score: +1

Christopher Judge

as Thanos in The Silver Surfer

Score: 0

Ralph Ineson

as Galactus in The Silver Surfer

Score: +1

Robert Pattinson

as Silver Surfer in The Silver Surfer

Score: +1

Sophie Turner

as Batgirl in James Gunn's DC Cinematic Universe

Score: -3

Jon Hamm

as Batman in Batman and the 3 Jokers

Score: +2

Yahya Abdul-Mateen II

as The Silver Surfer (Cameo in post credits scene) in The Fantastic Four (MCU)

Score: 0

Elizabeth Lail

as Invisible Woman in Who should play the MCU X-men, Inhumans, and Fantastic Four?

Score: +3

Adrien Brody

as The Hulk in Alternate MCU

Score: +3

Milo Gibson

as James "Logan" Howlett in Wolverine MCU

Score: +1