Who did more evil than everyone who ever lived before him?

Jeroboam, Omri, and Ahab

Go, tell Jeroboam, Thus saith the LORD God of Israel ... But hast done evil above all that were before thee. 1 Kings 14:9

Omri wrought evil in the eyes of the LORD, and did worse than all that were before him. 1 Kings 16:25

And Ahab the son of Omri did evil in the sight of the LORD above all that were before him. 1 Kings 16:30