Suggestions by @chrislondo

Zach Mills

as Steven Spielberg in American Crime Story: Another Dimension

Score: +1

Bill Hader

as Frank Marshall in American Crime Story: Another Dimension

Score: +2

Amybeth McNulty

as Brenda O'Connor in Wilseyville

Score: +1

Jennifer Jason Leigh

as Kate Beringer in Gremlins from Tim Burton

Score: +1

Judge Reinhold

as Gerald Hopkins in Gremlins from Tim Burton

Score: +1

Adam Driver

as Richard Stanley in Lost Soul - The Doomed Journey Of Richard Stanley's Island Of Doctor Moreau

Score: +2

Trent Reznor

as Composer in Wilseyville

Score: +1

John Corigliano

as Composer in Wilseyville

Score: +1

Philip Glass

as Composer in Wilseyville

Score: +1

Danny Elfman

as Composer in Wilseyville

Score: +1

James Woods

as William Kelly in Wilseyville

Score: +1

Michael Mann

as Producer in Wilseyville

Score: +1

David Fincher

as Director in Wilseyville

Score: 0

Olivia Cooke

as Nausicaä in Chronicles of the Multiverse

Score: +1

Judge Reinhold

as Nolan Sorrento in Ready Player One (1988)

Score: +2

Nastassja Kinski

as Princess Leia in Star wars Episode vi return of the Jedi (1993)

Score: +2

James Cameron

as Writer in Titanic (1987)

Score: +1

Mathilda May

as Princess Leia in Star wars Episode vi return of the Jedi (1993)

Score: +2

Ralph Macchio

as Luke Skywalker in Star wars Episode vi return of the Jedi (1993)

Score: +1