Kakarot. For those who are saying Goku put people at risk sometimes, keep in mind Goku was weaker than his opponent in those incidents and had previously tried at some point against those opponents. He's forced his friends and family leave a location many times out of fear that they could get hurt. Unless it was a matter of pride, Goku always was first to protect his friends and family. Not unless he knew someone could do it better (Gohan, Goten/Trunks, etc)