Blind Devoy was a absolute psycho in episode 46
Doji most likely, especially considering he had machinations of world domination from the jump of the series, with the destruction of the planet as his backup plan.
Ryuga or the child of nemesis(forgot his name) and ashtem
Doji even goes so far as to put his SOUL into a machine after dying just to get revenge by torturing and demonizing Gingka.