Still Under-rated = Genghis Khan.........He had a massive impact on the world...Opened east vs west trading, pioneer of religious tolerance of all religions throughtout empire, had a massive empire land-wise that he conquered (one of the biggest ever after starting real small) , 500+ wives with something like a ridiculous 1 in 7 Central Asians today tracing roots back directly to him....The Muslims and some others view him as a Barbarian, but only cause he kicked their ass and the Mongols kept very little records which is why they call it History (His Story)....Obviously, if somebody kicks ur country's ass u gonna record that person or people in history as a Barbarian