Suggestions by @dantedixon

Janet Jackson

as Rarity in One Hundred and One Cartoons (1971)

Score: +1

Billy Connolly

as King Fergus in Mr. Sonic & Lincoln (2009)

Score: +1

Corey Burton

as Captain Hook in Mr. Sonic & Lincoln (2009)

Score: +1

Mandy Moore

as Rapunzel in Mr. Sonic & Lincoln (2009)

Score: +1

Robert Downey Jr.

as Soundtrack Composer in Rise of the Guardians (2005)

Score: 0

Jasmine Guy

as Sawyer Cat in Alex Hears a Toon! (2004)

Score: +1

John Powell

as Assistant Director in Alex Hears a Toon! (2004)

Score: +1

Anne Hathaway

as Jewel in Alex Hears a Toon! (2004)

Score: +1

Eddie Murphy

as Mushu in Alex Hears a Toon! (2004)

Score: +1

Ben Stiller

as Alex the Lion in Alex Hears a Toon! (2004)

Score: +1

Scott Bakula

as Danny Cat in Alex Hears a Toon! (2004)

Score: +1

Wayne Allwine

as Mickey Mouse in Rise of the Guardians (2005)

Score: +1

John Leguizamo

as Producer in Rise of the Guardians (2005)

Score: +1

Kevin Kline

as Phoebus in Mr. Sonic & Lincoln (2009)

Score: +1

Tara Strong

as Sci-Twi in Mr. Sonic & Lincoln (2009)

Score: 0

Chris Wedge

as Executive Producer in Rise of the Guardians (2005)

Score: +1

Carroll O'Connor

as The Great Prince in One Hundred and One Cartoons (1971)

Score: +1

Cloris Leachman

as Rarity in One Hundred and One Cartoons (1971)

Score: +1

Rarity

as Rarity in One Hundred and One Cartoons (1971)

Score: +1

Barbara Streisand

as Sawyer Cat in One Hundred and One Cartoons (1971)

Score: +1