Suggestions by @coolot1

Jet Li

as Master Splinter in Teenage Mutant Ninja Turtles: The Next Mutation

Score: -1

Mae Whitman

as Venus De Milo in Teenage Mutant Ninja Turtles: The Next Mutation

Score: +1

Ben Mendelsohn

as The Dragon Lord in Teenage Mutant Ninja Turtles: The Next Mutation

Score: -1

Jesse Eisenberg

as Donatello in Teenage Mutant Ninja Turtles: The Next Mutation

Score: +1

Tom Holland

as Michelangelo in Teenage Mutant Ninja Turtles: The Next Mutation

Score: +1

Stephen Amell

as Rapheal in Teenage Mutant Ninja Turtles: The Next Mutation

Score: -1

Darren Criss

as Leonardo in Teenage Mutant Ninja Turtles: The Next Mutation

Score: -1

Emily Bett Rickards

as Blue Diamond in Steven Universe

Score: +2

Halle Berry

as Maria Rambeau in Captain Marvel

Score: +1

Chris O'Donnell

as Yon-Rogg in Captain Marvel

Score: +2

John Krasinski

as Phil Coulson in Captain Marvel

Score: +1

Robert Downey Jr.

as Yon-Rogg in Captain Marvel

Score: +2

Robin Williams

as Talos in Captain Marvel

Score: +2

Carrie Fisher

as The Supreme Intelligence in Captain Marvel

Score: +3

Mae Whitman

as Carol Danvers in Captain Marvel

Score: -2

Ye

as N'Jadaka in Black Panther (2008)

Score: -5

Kayne West

as N'Jadaka in Black Panther (2008)

Score: -4

Mahershala Ali

as T-1000 in Terminator: Skynet Wars

Score: +1