[txcforever]

I believe it's Brolly. Given that all of the characters gave their powers to Goku so he could beat him that makes him one big tough S.O.B. If he wasn't killed I believe he would be a lot more tougher than Goku.
Too bad Akira Toriyama believed that crappy and ugly characters like Cell and Buu made more interesting villains than Brolly. One of the few times that I wished for the bad guy to win.