Suggestions by @juicytitan

John Goodman

as John Silver in Treasure Planet

Score: +2

Jacob Tremblay

as Extra-Billy in Sharkey the bounty hunter

Score: +2

Christopher Meloni

as Sharkey in Sharkey the bounty hunter

Score: +1

Ron Perlman

as Cyrus Gold in Solomon Grundy fan movie

Score: +1

Damon Herriman

as Charles Manson in Serial Killer Biopics

Score: +11

Nick Robinson

as Iceman in X-men

Score: 0

Harvey Keitel

as Harvey keitel in Christopher Nolan Vs Quentin Tarantino

Score: +1

Billy Magnussen

as Kite-man in Batman villians

Score: 0

Ed Harris

as Mr freeze in Batman villians

Score: -2

Michael C. Hall

as Black Mask in “The Batman” fancast

Score: +2

Gina Rodriguez

as Jessica Cruz in Green Lantern Corps

Score: +1

Diane Guerrero

as Jessica Cruz in Green Lantern Corps

Score: -2

Lance Reddick

as Abin Sur in Green Lantern Corps

Score: +2

Stephen Merchant

as Tomar-Re in Green Lantern Corps

Score: +2

Robbie Amell

as Kyle Rayner in Green Lantern Corps

Score: +3

Toby Jones

as Hubert Humphrey in LBJ: The Presidential Years (1989)

Score: 0

Bruce Greenwood

as Alan Scott in Green Lantern Corps

Score: +2

Alan Tudyk

as Larfleeze in Green Lantern Corps

Score: +4

Christopher Judge

as Atrocitus in Green Lantern Corps

Score: 0

Keith David

as Atrocitus in Green Lantern Corps

Score: +2