I stand by the fact that Sasuke is greater than 4 of the 5 Kage. He humiliated the raikage by hitting him with chidori, and even provoked raikage into sacrificing his arm- at no cost to Sasuke.
The kazekage's supposed ultimate defence is now notably inferior to Sasuke's susano'o defence, so the tables are turned on kazekage- his only claim to power is obsolete vs. Sasuke.
The mizukage appeared to have the upper hand when she launched her assault on Sasuke, but his chakra was low- after being restored to full stamina by Zetsu, Sasuke's susano'o easily regenerated from mizukage's attacks stronger than ever before. Even the mizukage's impressive offence is useless against Sasuke. I believe the mizukage is the luckiest of the kage, since Sasuke chose to ignore her rather than slaughter her.
The acting hokage Danzo was easily killed by Sasuke, so it's fair to claim Sasuke is better than the hokage. It is difficult to argue whether Sasuke can defeat Tsunade, so maybe I should have said he can defeat 3 kage... hm....
Finally, the only kage superior to Sasuke beyond a shadow of doubt is the tsuchikage. His dust-style techniques are far beyond Sasuke's level, not even leaving Sasuke time to react before instant-death. Thankfully Tobi was there to save Sasuke from certain defeat at the hands of tsuchikage, greatest among the 5 kage.