Wildcat III - II's been dead for years. (This sort of thing is why Wikipedia doesn't use roman numerals for denoting legacy heroes...)
And I really disagree about Citizen Steel - he's one of the less violent heroes out there by nature. Someone whose major concern upon getting powers was 'how can I hug my cousins without killing them?' isn't going to be jumping to the team based around 'let's go punch things, instead of making sure our team-mate's not bleeding out'.