Suggestions by @user_355970

Tress MacNeille

as Calvin's Grandma in Calvin and Hobbes: The Animated Series

Score: +1

Frank Welker

as Calvin's Grandpa in Calvin and Hobbes: The Animated Series

Score: +1

Grey DeLisle

as Rosalyn in Calvin and Hobbes: The Animated Series

Score: +1

June Foray

as Miss Wormwood in Calvin and Hobbes: The Animated Series

Score: +1

John Kassir

as Moe in Calvin and Hobbes: The Animated Series

Score: +1

Rob Paulsen

as Mr. Bun in Calvin and Hobbes: The Animated Series

Score: +2

John Kassir

as Mr. Bun in Calvin and Hobbes: The Animated Series

Score: -1

Kath Soucie

as Susie Derkins in Calvin and Hobbes: The Animated Series

Score: +1

David Warner

as Uncle Max in Calvin and Hobbes: The Animated Series

Score: +1

Mark L. Taylor

as Calvin's Dad in Calvin and Hobbes: The Animated Series

Score: +1

E.G. Daily

as Calvin's Mom in Calvin and Hobbes: The Animated Series

Score: +1

Jim Cummings

as Hobbes in Calvin and Hobbes: The Animated Series

Score: +1

Pamela Adlon

as Calvin in Calvin and Hobbes: The Animated Series

Score: +1

Larry Brantley

as Wishbone in The Magical Adventures of Penn & Teller

Score: +1

June Foray

as Madame Two-Heads in The Magical Adventures of Penn & Teller

Score: +1

Tress MacNeille

as Madame Two-Heads in The Magical Adventures of Penn & Teller

Score: +1

David Herman

as The Three-Headed Aliens in The Magical Adventures of Penn & Teller

Score: +1

Frank Welker

as The Three-Headed Aliens in The Magical Adventures of Penn & Teller

Score: +1

Dee Bradley Baker

as The Three-Headed Aliens in The Magical Adventures of Penn & Teller

Score: +1

Billy West

as Buzzy the Magical Alien in The Magical Adventures of Penn & Teller

Score: +1