where did you get that he had used up most of his chakra from? he had just used an s-rank combination technique and didn't even seem tired.I believe you said how many people can defeat an s-rank ninja, by this you were clearly talking about kakuzu. Whether fazed or not even after getting 2 hearts destroyed already but also using up most of his chakra, he still wouldve defeated base naruto, saying other wise is nonsense.
If we are talking talking base naruto, the only akatsuki he can defeat is hidan
the fact is, that with 3 hearts or 5, naruto fooled kakuzu with bunshin twice, and got him with rasenshuriken once (would have been twice were it not for the fact that he was already tired out and had just perfected the jutsu). so the fact that kakuzu is leagues more powerful than base naruto is pretty much irrelevant, because he showed that he has the tools to defeat him. you're ignoring how well naruto uses his clones, he's fooled pretty much everyone with them, including deidara,kakuzu, and nagato several times.
anyway, this thread is about whether or not naruto is jounin level, not how many akatsuki he can beat. And I maintain, with Naruto's level of stamina, his strength and speed, his battle tactics, and his s and a-rank techniques, one would be a fool to say he isn't jounin level.
people assume that by jounin they mean the likes of kakashi,gai,darui etc, those are the very elite. but saying that naruto isn't on a par with say, aoba or genma or ebisu or even neji in base is just flat out biased and ridiculous. you have to be to even be able to attack s-rank criminals without getting wiped out, look what happened to kotetsu and izumo against kakuzu. they didn't even have a chance.