Alexander comes to my mind because the very young age he succeeded his father and the way he conquered the then known world. Because doing so he laid the foundations for the spread of knowledge (and christianity) for instance by introducing Greek as a lingua franca.
In spite of his very young age he was wise, clever, cunning and brave. And he respected every culture.
.. i love Captain Planet.. but then again i am a tree hugger :)
Saving the world, defeating litterers.. its my "epic"