Suggestions by @bumpdrafter

John Cleese

as Jean Girard in Talladega Nights: The Ballad of Ricky Bobby (1986)

Score: +3

Elmer Bernstein

as Composer in The Empire Strikes Back (1960)

Score: +1

Orson Welles

as Darth Vader in The Empire Strikes Back (1960)

Score: -1

Debbie Reynolds

as Leia Organa in The Empire Strikes Back (1960)

Score: +4

Robert Redford

as Luke Skywalker in The Empire Strikes Back (1960)

Score: -2

Norman Lloyd

as Ben (Obi-Wan) Kenobi in The Empire Strikes Back (1960)

Score: 0

Paul Newman

as Han Solo in The Empire Strikes Back (1960)

Score: +3

Norman Lloyd

as Obi-Wan Kenobi in Star Wars (1957)

Score: -2

Buddy Holly

as Chewbacca in Star Wars (1957)

Score: -1

Mickey Rooney

as Han Solo in Star Wars (1957)

Score: -3

Elmer Bernstein

as Composer in Star Wars (1957)

Score: +1

Neil Patrick Harris

as Doc Hudson in Cars 4

Score: +1

Gene Hackman

as Doc Hudson in Cars (2001)

Score: +1

Vin Diesel

as Lucius Washington in Talladega Nights: The Ballad of Ricky Bobby (2016)

Score: +1

Josh Lucas

as Larry Dennit, Jr. in Talladega Nights: The Ballad of Ricky Bobby (2016)

Score: +2

Brendan Hunt

as Jean Girard in Talladega Nights: The Ballad of Ricky Bobby (2016)

Score: +2

Ben Stiller

as Jean Girard in Talladega Nights: The Ballad of Ricky Bobby (2001)

Score: +1

Allen Covert

as Cal Naughton Jr. in Talladega Nights: The Ballad of Ricky Bobby (2001)

Score: +1

Kevin James

as Cal Naughton Jr. in Talladega Nights: The Ballad of Ricky Bobby (2001)

Score: -1

Zendaya

as Dr. Claire Lewicki in Days of Thunder (1990 remake)

Score: +1