Suggestions by @dragonassassin7

Tom Hiddleston

as Jonathan Harker in Dracula

Score: +2

Rami Malek

as R. M. Renfield in Dracula

Score: +2

Bill Skarsgård

as R. M. Renfield in Dracula

Score: +6

Cillian Murphy

as R. M. Renfield in Dracula

Score: 0

Taron Egerton

as Jonathan Harker in Dracula

Score: +1

Asher Angel

as Seliph in Fire Emblem: Genealogy of the Holy War

Score: +1

Shiloh Nelson

as Anakin Skywalker (Young) in Star Wars Gender Swap (Prequel Trilogy)

Score: -1

Linda Cardellini

as #6 in Celebs who could play siblings in a movie

Score: +6

Chris Hemsworth

as #8 in Celebs who could play siblings in a movie

Score: -1

Richard Madden

as #8 in Celebs who could play siblings in a movie

Score: -2

Jennette McCurdy

as #8 in Celebs who could play siblings in a movie

Score: -4

Jennette McCurdy

as #2 in Celebs who could play siblings in a movie

Score: +6

Linda Cardellini

as #20 in Celebs who could play siblings in a movie

Score: +12

Birgitte Hjort Sørensen

as #8 in Celebs who could play siblings in a movie

Score: -4

Ingrid Bolsø Berdal

as #8 in Celebs who could play siblings in a movie

Score: -4

Katheryn Winnick

as #8 in Celebs who could play siblings in a movie

Score: -3

Stephanie Courtney

as #20 in Celebs who could play siblings in a movie

Score: +2

Sarah Silverman

as #23 in Celebs who could play siblings in a movie

Score: +4

Charlize Theron

as #8 in Celebs who could play siblings in a movie

Score: +5

Krysten Ritter

as #14 in Celebs who could play siblings in a movie

Score: +8