Hannibal's near contemporaries reckoned he was the best. Hannibal himself said Pyrrhus of Epirus was the best ( buggerall historical data survives, and Hannibal would've known far more than we do today ).
Alexander was left a peerless army with superb generals by his late father, to write his place in history.
Gustav Adolphus, Charles XII, both dynamic charismatic leaders.
Closer to our times there's Napoleon - the stuff of legend.
In WW2 Von Manstein was good at stabilising catastrophes.......
Napoleon gets my vote, and he played a mean guitar ( true ).
Fantasy commander - Xena.
