Why didn't you put George Washington as an option? My god, without him, the US wouldn't exist. He is the best leader this country ever had. GW Bush? Give me a break. The only thing him and George Washington have in common is their first name.
I think that Josip Broz Tito was the greates (I'm too young to know but from stories I've heard)... I mean, mean was fighting against USA and SSSR at the same time p.l.u.r.
Terrible military official, though. Nearly kicked-out many times. He was a great man in history.....although the lack of intellectual interest really made him not a complete leader. If you put Thomas Jefferson and George Washington together, you got the best leader....