Suggestions by @dantedixon

Denise Nickerson

as Nemo in One Hundred and One Cartoons (1971)

Score: +1

Demond Wilson

as Captain Spirit in One Hundred and One Cartoons (1971)

Score: +1

Dolly Parton

as Fluttershy in One Hundred and One Cartoons (1971)

Score: +2

Fluttershy

as Fluttershy in One Hundred and One Cartoons (1971)

Score: +1

Elizabeth Hartman

as Mrs. Brisby in One Hundred and One Cartoons (1971)

Score: +1

Kenneth Mars

as Tom Dupain in Adrien (1987)

Score: +1

John Lasseter

as Director in Alvin Little (1995)

Score: +1

Nancy Cartwright

as Happy in The Adventurer's New Groove (1995)

Score: +1

Brenda Chapman

as Writer in The Adventurer's New Groove (1995)

Score: +1

Ben Stiller

as Alex the Lion in Alvin Little (1995)

Score: +1

Justin Long

as Alvin Little in Alvin Little (1995)

Score: +1

Robert De Niro

as Prince Phillip in The Empire Strikes Back (1975)

Score: +1

Tanya Roberts

as Princess Aurora in The Empire Strikes Back (1975)

Score: +1

Rob Reiner

as Jim Hawkins in The Empire Strikes Back (1975)

Score: +1

Bill Bixby

as Sam Wilson in The Empire Strikes Back (1975)

Score: +1

Tony Jay

as Jason Voorhees in The Empire Strikes Back (1975)

Score: +1

John Candy

as B.E.N. in The Empire Strikes Back (1975)

Score: +1

Robert Downey Jr.

as Dr. Stark in Alvin Little (1995)

Score: +1

Jodi Benson

as Ariel Little in Alvin Little (1995)

Score: +1

Kenneth Branagh

as Cousin Miguel in Alvin Little (1995)

Score: +1