List from both sides.
On the good side i think it would be Naruto, he can detect the Zetsu clones as well as defeated some very difficult oponents.
From the other side it would be Madara/Kabuto (for resurrecting Madara and other dead shinobi) not sure who the credit goes to although Madara does say that it was his power to begin with.
DON'T FORGET THE PEOPLE WHO HAVE DONE SMALL THINGS LIKE THE MEDICAL SQUAD ETC.
On the good side i think it would be Naruto, he can detect the Zetsu clones as well as defeated some very difficult oponents.
From the other side it would be Madara/Kabuto (for resurrecting Madara and other dead shinobi) not sure who the credit goes to although Madara does say that it was his power to begin with.
DON'T FORGET THE PEOPLE WHO HAVE DONE SMALL THINGS LIKE THE MEDICAL SQUAD ETC.