Kakashi, Gai, and Tsunade might be able to hold their own. And possibly Jonin Commander Shikaku. Not saying they would win at all but they would do much better than everyone else.
Naruto was the nail in the ninja rank coffin, i mean
he completely did away with the thoughts of..."all
genin are weak and stupid" everyone in the village knows
that naruto is by far the strongest and theres no need to
dispute it.....none of the shinobi in konoha would be able to
last in a battle with naruto......its just not gonna happen
there is no need to even try and rank him bcuz he just keeps
surpassing all the boundaries and hurdles set out in front of him
but if i were to try and rank him....he would most definitely be
hokage level and if there is a level above hokage then get ready
to put him in that bracket bcuz he will be there soon(if he isnt there alrdy)