Yeah, I'd say he could hold his own against a Kage. I don't think he could beat any of them, except maybe the Mizukage. I'd still put him at Kage level though.
He could defeat any Kage at this time. In fact, the only Kages throughout history his new eye technique would probably lose to are Hashirama, Minato, and Hiruzen.
He could defeat any Kage at this time. In fact, the only Kages throughout history his new eye technique would probably lose to are Hashirama, Minato, and Hiruzen.
Kakashi is defiantly a Kage level fighter but to go as far as to say he could beat every kage that's living now, that might be pushing it. Plus you have to consider that fact that while fighting Kakashi can only use his Mengekyo Sharingan about 3 or 4 times before it's to much and he over uses it.