Trajan.  Why do we feel so conflicted when we think about you?  Well, Trajan was one of the Five Good Emperors, rising to power at a moment when Rome was the bully in the schoolyard and he knew how to wield that power brilliantly, Octavian-like, in a manner that did not threaten the Senate.  Golden boy, Pompey-ish.  Forever more, new emperors would be blessed in his name upon their ascension.  The Roman Empire would reach its greatest territorial extent thanks to his efforts.  But is he a hero???  Can we say no???