Mild

Definitions: (1) having great bodily strength or physical power; very robust or vigorous; commanding; (2) wonderful; colossal; (3) important; momentous; (4) of high status <said of kings and others with the highest rank>

Comment: Although one can be mighty of mind, this quality is most often reserved for physical prowess. Although there have been quite a few who were so mighty of spirit as to make ripples (and even waves) through time.