Suggestions by @ange1e4e5

Ronald Lacey

as Dr. Allen Chamberlain in The Mummy Original Trilogy (1989-1998)

Score: +1

Famke Janssen

as Melisandre in Game of Thrones (2001-2009)

Score: +2

Ian McKellen

as Tywin in Game of Thrones (2001-2009)

Score: -1

Ian McKellen

as Wilhuff Tarkin in Star Wars (1997)

Score: +1

Basil Rathbone

as Obi-Wan Kenobi in Star Wars (1957)

Score: +1

John Rhys-Davies

as Robert Baratheon in Game of Thrones [1991-1999]

Score: 0

R. Lee Ermey

as Captain Jacobs in Fatman (1990)

Score: +1

Tyler Mane

as Chewbacca in Star Wars: Episode V – The Empire Strikes Back (2000)

Score: +1

Alan Rickman

as Skinny Man, a hitman who works in a toy store in Fatman (1990)

Score: +1

Michael Kamen

as Composer in Fatman (1990)

Score: +1

Shane Black

as Writer in Fatman (1990)

Score: +1

Richard Donner

as Director in Fatman (1990)

Score: +1

Darlene Love

as Ruth in Fatman (1990)

Score: +1

John Dykstra

as Effects in The Lord of the Rings (1980)

Score: +2

Brendan Fraser

as Han Solo in Star Wars: Episode V – The Empire Strikes Back (2000)

Score: +2

Alan Rickman

as Ghostface in Scream (1986)

Score: +1

Dianne Wiest

as Aunt Beru in Star Wars Episode IV - A New Hope (1997)

Score: +1

Ian McKellen

as Grand Moff Tarkin in Star Wars Episode IV - A New Hope (1997)

Score: +1

Sam Shepard

as Uncle Owen in Star Wars Episode IV - A New Hope (1997)

Score: +1

Ian McKellen

as Grand Moff Tarkin in Star wars Episode IV a New Hope (1997)

Score: +1