Suggestions by @maxthecat67

John Barrymore

as 30's Lizard in Sinister Six (Sony Animation)

C. Aubrey Smith

as 30's Vulture in Sinister Six (Sony Animation)

Lionel Barrymore

as 30's Doctor Octopus in Sinister Six (Sony Animation)

Bela Lugosi

as 30's Green Goblin in Sinister Six (Sony Animation)

Bill Fagerbakke and Tom Kenny

as Funtime Freddy and Bon-Bon in RaditatorSpringLogan

Bill Fagerbakke and Tom Kenny

as Those Two Actors in Celebrities Sorted by Tropes

Jodelle Ferland

as Minireena in RaditatorSpringLogan

Pierre Coffin

as Bidybab in RaditatorSpringLogan

Steve Martin and Martin Short

as Splatter and Dodge in Thomas the Tank Engine the Movie (1992)

Lucille La Verne

as Narrator in The Pebble and the Penguin (1945)

Mel Blanc

as Drake's Goons in The Pebble and the Penguin (1945)

Lionel Barrymore

as McCallister in The Pebble and the Penguin (1945)

Conrad Veidt

as Gentoo in The Pebble and the Penguin (1945)

Mel Blanc

as Tika in The Pebble and the Penguin (1945)

Errol Flynn

as Royal in The Pebble and the Penguin (1945)

Edward Van Sloan

as King in The Pebble and the Penguin (1945)

Roscoe Arbuckle

as Chubby in The Pebble and the Penguin (1945)

The Three Stooges

as Chinstraps in The Pebble and the Penguin (1945)

Fred Astaire and Ginger Rogers

as Magellanics in The Pebble and the Penguin (1945)

Donnie Dunagan

as Beany in The Pebble and the Penguin (1945)