Either Post-Namek Vegeta for reasons Fearless already mentioned, or Cell for basically being a dumber Vegeta and perhaps having the most asinine moment of dropping the ball in how he infodumped to Piccolo after giving him the succ.
Fearless In Quarantine said:
6. Not giving his Ki to Goku who formed a Genki Dama against Jiren.
Goku. Vegeta was arrogant, but he didn't put the lives of everyone else on his shoulders. Goku did, yet made decisions only based on his own interests.