G1 Starscream
Starscream is a Decepticon who's always trying to take over, but he's just a total failure. He's smart, but he's also a total idiot who always messes things up.
"Starscream tried to take over the Decepticons again, and it ended with him getting thrown out of a spaceship."
"I swear, every time Starscream makes a plan, it ends with him getting laughed at."
"Starscream's latest plan was so bad, even the Combaticons were confused."