G1 Starscream
Starscream is a Decepticon who's always trying to replace Megatron, but he's just a loser with a jet form. He's smart, but he's also a total idiot.
"Starscream tried to replace Megatron, and it ended with him getting kicked out of the Decepticons."
"I saw Starscream and Megatron fighting, and it was like watching a dog fight a cat."
"Starscream's latest plan was so bad, even the Combaticons laughed at him."