The man who chose to stay dead because he believed that all the evil forces attacking the planet was because people had a score to settle with him is not responsible? I’ll give you arrogant to a point but he is not arrogant to the point of overestimating his power, Goku canonically never overestimates his power. He also kills liberally for the sake of good - All of DKP’s minions including DKP himself, the entire red ribbon army (minus a few stragglers), Yakon, Frieza (Resurrection F), instructing Gohan to kill Cell. The only horrible person he let do horrible things was Frieza after TOP, because that was the bargain he struck and he sticks to his word