gotta go with any Spartan, but specifically King Leonidas because he's the most renown for a reason. only a real bad@$$ could lead 300 men against 300,000. Their whole culture was based on war, if they had an established city-state today i'm sure they would perfect modern warfare, maybe like the IDF or SEALs but with that extra bit of hardcore because it was a 24/7 lifestyle since childhood for a Spartan.