In my opinion, Naruto could already be the Kage of the village.
1. The villagers said that Naruto was worthy of being Kage.
2. The Jonin value Naruto's power and opinion (Shikaku obeyed him and said that Naruto was in another league already).
3. He's the strongest ninja of the village.
The only thing that goes against him, he's that he might not be the best to take decision, since he's too emotional, but... as I said before, Tsunade was the same...
She was taking decision according to her emotions and her "love" for Naruto.
So, this is nothing that Naruto cannot overcome...
Give him two wise advisors (ex: Shikamaru and Sakura), and he's Hokage-worthy for sure.
Naruto is a genin... sadly but i mean who would dare face him in another chunnin exam?? dat would be to easy, i mean the hokage herself cant beat him... NO ONE in the village stands a chance!! I would hate for naruto to become hokage! i mean he would b behind a desk all day with no action... he'd be best if he somehow he replaces the role of jryia and acts as konohas protector not hokage.... He's better suited fighting solo bcuz most his jutsu are of great power!
Power wise he's beyond S-rank... i mean really there are prolly a bunch of s-class ninjas in the village and none of which could stand a punchers chance agaisnt pein....
he lacks the killer instinct to be a real ninja, hasn't led a group of ninjas to a mission, his emotions take over too much. But just cause he became a Sage, i put him as a special jounin.
i think Kage level hands down. He could take all the current Kages pretty easily i think. his real problem is his lack of experience with team situations. hes never really been tested in that regard, then theres is out of control emotions. he has all the power and strength he needs. now its time for his battle experience to grow.
He will Most likely remain a Genin until he becomes Hokage. just because he would be the first to go from Genin to Hokage it just fits the story haha
Now he is at Kage level. He only lacks a bit of expierence and some more training with his powers. Then he will be surely at Kage level or may be even above, because he will have too much offensive power.
And I can't agree with the statement that he lacks lidership. If he didn't want someone to interfere his fight against Pain, that was only because Pain is too strong and Naruto used brutal techs that can cover a big area.
Well it depends on what kage level is about.
If it is about kage level strength
then sure, he is kage level.
but for me, he is best chunin/jounin for now since he likes to solo