<p>Naruto is demigod, so surely he would be in first place. Then Hashirama, the only shinobi that could really stand to Madara. Third one would be hard, either Tobirama or Hiruzen (well, Hiruzen as old man hold his ground against Orochimaru, ET Hashirama and ET Tobirama, so in his prime he probably was really strong). Then Minato (yes, he was quiet strong with Kurama, but he didn't have him when he was alive), Tsunade, Kakashi. Kakashi was very intelligent, cunning and has good leadership skills (though he sucks as teacher), but in terms of raw power he wasn't very strong. Like in The Last, when he was just starring at falling meteorite when Sasuke obliterated it with one technique.
</p>