Suggestions by @pinheadtv

Bill Murray (Space Jam)

as Eddie Valiant in Who Framed Roger Rabbit (1988 Alternate Cast)

Score: +2

Steven Spielberg

as Producer in Jurassic Park (Alternate Cast)

Score: +1

Joe Dante

as Director in Jurassic Park (Alternate Cast)

Score: +1

Dick Miller

as Dr. Lewis Dodgson in Jurassic Park (Alternate Cast)

Score: +1

Toshirō Mifune

as Dr. Henry Wu in Jurassic Park (Alternate Cast)

Score: +1

David Fincher

as Director in The Green Mile (1999 Alternate Casting)

Score: +3

Danny Trejo

as Brutus Howell in The Green Mile (1999 Alternate Casting)

Score: -2

William Fichtner

as Klaus Detterick in The Green Mile (1999 Alternate Casting)

Score: +3

Hugo Weaving

as Dean Stanton in The Green Mile (1999 Alternate Casting)

Score: +1

Telly Savalas

as Kojak in Superman: the Film

Score: +1

Farrah Fawcett

as Lois Lane in Superman: the Film

Score: +2

Christopher Reeve

as Perry White in Superman: the Film

Score: +1

Jack Nicholson

as Lex Luthor in Superman: the Film

Score: +2

Patrick Wayne

as Superman in Superman: the Film

Score: +2

Mario Puzo

as Writer in Superman: the Film

Score: +1

Francis Ford Coppola

as Director in Superman: the Film

Score: +1

John Williams

as Composer in Superman: the Film

Score: +1

Pierre Spengler

as Producer in Superman: the Film

Score: +1