Suggestions by @themanhimself

Fred Tatasciore

as Ludo in Ready Player One: The Video Game

Score: +1

Michael J. Fox

as Sonic the Hedgehog in Sonic the Hedgehog (1990)

Score: +9

David Jason

as Del Boy Trotter in Multiverse

Score: +1

James Earl Jones

as Mufasa in The Lion King IV

Score: +1

Anna Kendrick

as Becka in Multiverse

Score: +1

Michael Biehn

as Kyle Reese in Multiverse

Score: +1

Freddie Highmore

as Arthur in Multiverse

Score: +2

Michelle Pfeiffer

as Elizabeth Collins in Multiverse

Score: +1

John Cleese

as Basil Fawlty in Multiverse

Score: +1

Burt Young

as Paulie in Multiverse

Score: +1

Teagan Croft

as Rachel Roth in Multiverse

Score: +1

Ewan McGregor

as Obi-Wan Kenobi in Multiverse

Score: +2

Ardal O'Hanlon

as Father Dougal Maguire in Multiverse

Score: +1

The Annoying Orange

as The Annoying Orange in Multiverse

Score: +3

Helena Bonham Carter

as Bellatrix in Multiverse

Score: +2

Charlize Theron

as Queen Ravenna in Multiverse

Score: +1

Dane DeHaan

as Valerian in Multiverse

Score: +2

Natalie Dormer

as Taylor Swift in Celebrity Biopics

Score: -3