Suggestions by @droga4

Nicolas Cage

as Scarecrow/Dr. Jonathan Crane in Batman: Gotham Knightmare

Score: +1

John C. Reilly

as Professor Pyg in Batman: Gotham Knightmare

Score: +1

Christoph Waltz

as Mr Freeze in Batman: Gotham Knightmare

Score: +1

Jim Carrey

as The Joker in Batman: Gotham Knightmare

Score: 0

Vincent Piazza

as The Penguin/Oswald Cobblepot in Batman: Gotham Knightmare

Score: +1

Mila Kunis

as Catwoman/Selina Kyle in Batman: Gotham Knightmare

Score: +2

Nicholas Hoult

as Batman/Bruce Wayne in Batman: Gotham Knightmare

Score: +1