Suggestions by @ivankarp

Charles Laughton

as King of Hearts in Alice in Wonderland (1937)

Score: 0

Benny Hill

as Otis in Superman The Movie (1958)

Score: 0

John Hamilton

as Perry White in Superman The Movie (1958)

Score: +1

Jack Larson

as Jimmy Olsen in Superman The Movie (1958)

Score: +2

Noel Neill

as Lois Lane in Superman The Movie (1958)

Score: +2

George Reeves

as Clark Kent/Superman in Superman The Movie (1958)

Score: +2

Burl Ives

as Santa Claus in Rankin/Bass' The Polar Express (1976)

Score: +2

Paul Lynde

as Sir Percy in Those Magnificent Men in Their Flying Machines

Score: +1

Robert Morley

as Vernon Dursley in Harry Potter And The Philosopher/Sorcerer's Stone (70's Cast)

Score: +1

Robert Morley

as Flash in Zootopia (1966)

Score: +2

Elizabeth Montgomery

as Judy Hopps in Zootopia (1966)

Score: +3

Edward G. Robinson

as Mr. Big in Zootopia (1966)

Score: +1

Nancy Sinatra

as Gazelle in Zootopia (1966)

Score: +1

Mel Blanc

as Duke Weaselton in Zootopia (1966)

Score: +2

Mickey Rooney

as Benjamin Clawhauser in Zootopia (1966)

Score: +3

Burl Ives

as Mayor Lionheart in Zootopia (1966)

Score: +2

W.C. Fields

as Barliman Butterbur in The Lord of the Rings (Golden Age of Hollywood)

Score: +1

Robert Morley

as Bilbo Baggins in The Lord of the Rings (Golden Age of Hollywood)

Score: +1

Burl Ives

as Gandalf in The Lord of the Rings (Golden Age of Hollywood)

Score: +1

Peter Ustinov

as Squire Trelawney in Treasure Island (1963)

Score: +1