Character Recommendations Based on Sheldon J. Plankton
Krusty The Clown The Simpsons

Hey hey kids! Send cash to the studio in case Krusty has gambling debts to pay off
Sue Sylvester Glee

A sardonic gym teacher with a sadistic streak

Anger Inside Out

A cantankerous hothead whose job is to get others riled up
Moe Szyslak The Simpsons

Crabby owner of the grimiest bar in Springfield
Alfredo Linguini Ratatouille

Hapless doesn't have to mean hopeless
Lord Farquaad Shrek

Tiny man with big, evil aspirations
Frank Reynolds It's Always Sunny in Philadelphia

Too gross even for the prostitutes he hires
Ultron Marvel's The Avengers

Security software turned evil mastermind
Princess Bubblegum Adventure Time

This regal leader is brilliant and determined, but can display a nasty temper
Bob Parr / Mr. Incredible The Incredibles

Ex-superhero now focused on being a dad, but he misses the action