Re: My top ten
restrictions: No edo army or edo immortality( it's cheap and requires massive preperation), no obscure character ( no sons of the Sage of Six Paths or Shisui Uchiha)
1. Sage of Six paths (this should be obvious)
2. Naruto ( I'll explain how he could beat Obito, Hashirama, and Madara below)
3. Obito ( edo jinchuriki and gedo statue)
4. Edo Madara ( no immortality but has wood style and rinnegan)
5. Hashirama
6. Nagato ( with Six Paths of Pain and then in person)
7. Minato ( because he's virtually untouchable and has summons and sealing)
8. Killer Bee
9. Sasuke EMS
10. Itachi
Naruto would be able to beat the edo jinchuriki and gedo statue with tailed beast mode and then enter sage mode and use frog kumite to counter kamui, or he could use shadow clones and let himself be absorbed and attack from the outside with the clones and use ransenshuriken to disable Obito's charka network. Then his clones will reverse summon him back.
Madara's perfect susano wouldn't be a problem for biju mode. Naruto's tails could grab the susano's arms and then pummel it until it's destroyed. And Naruto could disengage his 9 tails mode whenever Madara uses woodstyle.
Naruto's only problem with the rinnegan is almighty push, which he can withstand with biju mode.
Naruto can decimate Hashirama's wood style with rapid tailed beast bombs or just evade it. The only real threat is shin susenju. However, this jutsu is likely to be a one-shot jutsu ( because Hashirama's sage mode wore off soon after).