Suggestions by @bumblebee52s

Zach Galligan

as Damian in Mean Girls (But it's 80s)

Score: +1

Matthew Broderick

as Aaron in Mean Girls (But it's 80s)

Score: +1

Morgan Fairchild

as Regina in Mean Girls (But it's 80s)

Score: +1

Winona Ryder

as Janis in Mean Girls (But it's 80s)

Score: +1

Phoebe Cates

as Gretchen in Mean Girls (But it's 80s)

Score: +3

Suzanne Snyder

as Karen in Mean Girls (But it's 80s)

Score: +3

Molly Ringwald

as Cady in Mean Girls (But it's 80s)

Score: +2

John Boyega

as Geordi La Forge in Star Trek: The Next Generation

Score: +1

Benedict Cumberbatch

as Data in Star Trek: The Next Generation

Score: +1

Bryan Cranston

as Jean-Luc Picard in Star Trek: The Next Generation

Score: +1

Selena Gomez

as Deanna Troi in Star Trek: The Next Generation

Score: +1

Liam Hemsworth

as William Riker in Star Trek: The Next Generation

Score: +1

Zac Efron

as Dave in Killer Klowns From Outer Space

Score: +1

Dylan O'Brien

as Mike in Killer Klowns From Outer Space

Score: +1

Jennifer Lawrence

as Debbie in Killer Klowns From Outer Space

Score: +1

Katherine McNamara

as Heather McNamara in Heathers

Score: +1

Kiernan Shipka

as Laurie Strode in Halloween

Score: 0

Joe Keery

as Michael Myers in Halloween

Score: -1

George Clooney

as Dr Loomis in Halloween

Score: -1

Jacob Tremblay

as Tommy Doyle in Halloween

Score: +2