He took Raikage 1v1 and was about to die until Gaara saved him.
Tobi saved him when Onoki trapped Sasuke in that Dust Particle Jutsu
He also couldn't beat Killer Bee without getting saved
Hebi Sasuke gets wrecked.
This thread is full of Sasuke wank but I think you're pretty far off the mark. Sasuke
was training and trying out new moves with the kages. The raikage I believe could have won if not for his emotions at that time. If he'd just kept busting up susanoo (assuming Sasuke keeps his susanoo at ribcage level), the raikage could take Sasuke down in my opinion, but he didn't. That kick that the raikage was going to try to deliver would definitely have been tanked and he would be killed by those enton spikes. That ribcage susanoo tanked liger bomb while the raikage's kick was stopped by sand. Also keep in mind Sasuke had access to his full skeleton susanoo and was waiting to test it out (Jugo's words) so even if the ribcage couldn't handle it (which I think it could), he could just put up the full skeleton susanoo for more defense. Either way, the raikage dies but only due to his stupid choice of action.
I think that that MS Sasuke has an answer to Ohnoki: amaterasu. However, getting caught by particle style would be the end of him. The problem is he was running very low on chakra at these points. He definitely overworked himself. I think MS Sasuke could take on kages 1v1 but not several at a time or one right after another.
On to Killer Bee, this fight isn't a fair comparison at all. This is his first fight with MS, no curse mark, damaged from his Itachi fight, no susanoo or kagutsuchi, and he is not allowed to kill Bee (this means no amaterasu until the stakes are high because he didn't know he could turn it off). With susanoo, I believe he could take down Bee and with no restrictions on killing Bee, amaterasu would really harm him if Sasuke just lets it spread.
To answer the OP, Hebi Sasuke is kage level, but not really a high tier. Sure, he has impressive kage-level feats but I wouldn't say he's high tier because he wouldn't do so well against other kage at that point in my opinion.