Agreed that actual malice is relatively rare (at least, relative to incompetence!). But I feel your take on Hitler is questionable. The question of evil is a tricky one, but I don't think there's a good case to be made that he was only trying to do the right thing. He was completely insane. But leaving aside moral culpability or metaphysical notions of judgment, for any definition of "malice", he embodied it to an the absolute maximum degree.