Huh... don't really know. Depends if you distinguish between 'warrior' (fighting for personal glory/honour) and 'soldier' (fighting for the state).
If the former: I don't really know, once again.
If the latter: there're so many that I like aspects of, but none that stand out. However, best citizen soldier, no doubt Greek phalanx hoplite, for reasons political, practical and skill based.