I disagree so much.Shisui ftw.
To everyone saying Sasuke> Danzo> Shisui you are horribly wrong,
-Danzo did not have KA when he fought sasuke.
-Danzo held back and was planning on saving chakra to fight tobi
-Sasuke only got the upperhand because Danzo made a bad call in kidnapping karin
-Technically Danzo killed himself
-Shisui used KA on the uchiha not danzo, and we don't know what went down in that fight.
Even if Danzo was holding back, he used up all his Sharingans and he fought Sasuke right after Sasuke fought most of the Kages, even if he was healed, he still wasn't at full power. Also, if Danzo was holding back, why would he spam Izanagi like that? Sure, he was holding back at first, but Sasuke really pushed him to his limit. Sasuke > Danzo.
Danzo was stupid enough to kidnap Karin, and that's a low act if you ask me. It was his fault that Sasuke killed him, and that suicide jutsu was a last resort, he was gonna die anyway. Not to mention that Hashirama's cells were going out of control as well.