Board Thread:Theories and Speculation/@comment-1512913-20161119171442/@comment-1512913-20161129232548

Hashirama, Tobirama, Orochimaru, Mu, Madara etc. can use all 5 basic natures yet we have never seen them use more than 1 or 2, even though using more would have vastly improved their arsenal :P

Or take all the Hyuga with known natures who have never ever used one in combat on screen.