I know Orochimaru takes this match up. And I hope he showcases some new techs in the following chapters to make him even more op.
Fact: Kakuzu has nothing that can even potentially kill Orochimaru. While on the other hand, Orochimaru has techs that could possibly kill Kakuzu. That said Oro>Kakuzu
... Can't believe you guys can't notice the obvious way Kakuzu has of killing Orochimaru.. Oh well, you're probably not Kakuzu fans anyways.
I'll quote myself:
Kakuzu doesn't need to kill Oro with his AoE ninjutsu. Kakuzu strangles him until he dies just like he did to these ninja here:
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After Kakuzu kills of his snakes.. Oro will have to face this:
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Basically a V2 Jiongu Kakuzu has a shit ton of threads and can produce more of them whenever he wants:
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He doesn't need more threads, but I just added that as a bonus. Anyways Kakuzu envelopes the shit out of him so Oro won't be able to move and all. If Kakuzu wants to crush Oro's small chance of making a movement, he can pierce his body and make the threads make a tie with each others.
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Oro won't be able to move = Kakuzu can strangle the Kusanagi out of him. Since Oro needs oxygen to live and Kakuzu's tendrils will deny it for him, Oro dies. ._.