Suggestions by @atx_fad

Tobey Maguire

as Luke Skywalker in Star wars Episode IV a New Hope (2007)

Score: +1

Captain Marvel (Carol Danvers)

as Linda Hamilton in Which characters should actors have played in the 80’s?

Score: +2

Anakin Skywalker

as River Phoenix in Which characters should actors have played in the 80’s?

Score: +3

Sinestro

as Christopher Lee in Which characters should actors have played in the 80’s?

Score: +2

Dormammu

as James Earl Jones in Which characters should actors have played in the 80’s?

Score: +1

Flash Thompson

as Rob Lowe in Which characters should actors have played in the 80’s?

Score: +1

John Belushi

as Bruce Nolan in Bruce Almighty (1983)

Score: 0

Sam Elliott

as J. Jonah Jameson in The Sinister Six (TASM)

Score: -1

Matthew McConaughey

as Doctor Octopus in The Sinister Six (TASM)

Score: -3

Chris Cooper

as King Goblin in The Sinister Six (TASM)

Score: +2

Sterling K. Brown

as James Rhodes in Iron man 3 (2023)

Score: +1

Jessica Chastain

as Pepper Potts in Iron man 3 (2023)

Score: +2

Luke Evans

as Dr. Stephen Strange in Thor: Ragnarok (2017)

Score: +1

Chiwetel Ejiofor

as Heimdall in Thor: Ragnarok (2017)

Score: +1

Idris Elba

as Surtur in Thor: Ragnarok (2017)

Score: +1

Charlie Hunnam

as Thor in Thor: Ragnarok (2017)

Score: 0

Chris Hemsworth

as Actor in Actors Who Should do Horror

Score: +8

Margot Robbie

as Actress in Actors Who Should do Horror

Score: +5

Adam Driver

as Dr. Michael Morbius in Spider Man 4 (MCU)

Score: +1