Probably high diffs MS Sasuke, thats about it.
SM Kabuto wins with no more than medium difficulty. Sound genjutsu canonically could solo, and Tayuya's genjutsu doesn't require any extensive amount of prep time. Manda 2 is more than what Animal Path can handle on it's own. SM Kabuto has far superior reflexes, sensory, Bunshins, can heal from damage, not to mention no counters to White Rage or Muki Tensei.
The Gokage low diff on a bad day. Gaara alone is enough to potentially solo. Never mind the addition of Darui who none of them aside from maybe Deva can contest with in CQC, Kurotsuchi who can pop up out of nowhere and 1HKO them, and Chojuro's slicing range with his sword.
CST or CT can hardly ever be used in proper context with the 6POP, and are both easily countered/avoided anyways.