Suggestions by @edimarjp

Alan Arkin

as Scar in The Lion King (1980's)

Christopher Lloyd

as Scar in The Lion King (1980's)

Alan Arkin

as Eugene H. Krabs in Spongebob Squarepants (1980's)

Alan Arkin

as Mr. Krabs in Spongebob Squarepants (1970's)

Alan Arkin

as Shere Khan in The Jungle Book

Alan Arkin

as Shere Khan in The Jungle Book (1997)

Gilbert Gottfried

as French Narrator in Spongebob Squarepants (1980's)

Gilbert Gottfried

as Patchy the Pirate in Spongebob Squarepants (1980's)

Gilbert Gottfried

as SpongeBob SquarePants in Spongebob Squarepants (1980's)

Fred Astaire

as Nelson Muntz in The Simpsons (1940s)

George Burns

as Nelson Muntz in The Simpsons (1940s)

Fred Astaire

as Timon in The Lion King (1944–1954)

Claude Rains

as God in The Simpsons (1940s)

Charles Laughton

as Superintendent Gary Charmers in The Simpsons (1940s)

Walter Pidgeon

as Nelson Muntz in The Simpsons (1940s)

Maurice Chevalier

as Nelson Muntz in The Simpsons (1940s)

Emma Thompson

as Sedusa in The Powerpuff Girls

Emma Thompson

as Ms. Keane in The Powerpuff Girls

Julia Louis-Dreyfus

as Dory in Finding Nemo (1992)

James Cromwell

as Bruce in Finding Nemo (1982)