I'd say MS Sasuke, because he defeated Danzo who was a Kage. The reason I wouldn't say Hebi Sasuke was Kage level is because he beat a sick Itachi who intentionally lost and almost was killed be Deidera(Deidera beat Gaara only because Gaara was also focusing on protecting his village which kept him from going all out and ended up distracting him). Plus MS Sasuke barely makes the cut to Kage level because he was demolished by the other Kages at the Kage summit.
You acknowledge Deidara nearly blowing sasuke up but fail to acknowledge that was Deidara's only hope of beating sasuke and that sasuke pushed him to use a suicide jutsu.
True Itachi was sick and let sasuke win but lets be honest a sick none interested itachi still solo'd kakashi neg diff and orochimaru and Deidara.
Damn dude it seems like you are hating because it was clear he faced more than 1 kage and even drawed with A the strongest kage, he faced A, samurai, darui, gaara, mei, chojuro, all while partially blind and with every cell in his body hurting and exhausted from the level and amount of competition he was facing.