Um...everyone accept maybe um...well karin and um...that guy Hidan.
Think people are underestimating zetsu here, the guy is fighting a war using only half of himself against the five nations with his clones, that gotta count for something.
His other half is fighting Mei, chojuro, and the yondaime hokage's body guards and holding his own, I dunno, that's quite awesome to me for someone to do all that, which other kage could take on the 5 nations and actually pose a threat to them besides maybe minato with his unfare hirashin , nagato, or Kabutomaru.
Hidan? Um....hmmm....kage level if the battle begins when you don't have intel on him, but if you have intel beforehand, I don't know if you can even acknowledge him as a shinobi then.
Karin, um...lmao!
Jugo? Aint seen him at full power yet (was in his child form against the raikage). I think he could be if he didn't go insane when he goes curse mode, coz he's actually quite smart and knoiwledgeable, but the insanity just takes it away for me, power and speed aren't that wow without brains, not quite there, maybe low kage.
Suigetsu? This guy took a tailed beast bomb from the eight tails head on and lived. Can enhance his strength and gain super strength by hydrating his limbs to make them bigger and stronger, evidence indicates that he knows the second mizukage's water gun tech and is immune to all physical and ninjutsu attacks except raiton element, was fast enough to stop the raikage's attack from hitting sasuke even though he had to traverse a long distance from the balcony while carrying a huge ass sword, I think this guy is strong too, he just got unlucky to always face guys like darui and B who could negate his jutsu with raiton, and kisame who could absorb his chakra. Oh yeah another thing is chakra levels, from what we know, samehade with direct contact absorbs up to six tailed cloak's worth of chakra at a time, but when he kisame swiped through suigetsu and absorbed his chakra, the guy didn't even notice until Kisame pointed it out, that to mean that he is either dumb, or he has that much chakra that he didn't even feel that much amount of chakra taken from him, an amount that should kill even an elite jounin if samehada really does take that much. Low kage I think.
The rest except for genin level karin and Hidan with intel, are definately kage level though.