Pretty much what KidGamer said. Any other character he faced he can beat by himself or is so above his league that a cloak would not make any difference.
He beats Hashirama in both S1 and S2 (Definetely if Hashirama is in base, though Nagato can beat Hashirama even when he has SM). Sasuke is defeated even without the cloak. EMS Madara gets anhihilated in S2 (will probably lose even with Kurama).