Did we ever learn who the other two are?

[MightGai]

You never learn Gai....

So,i guess Fat guy survived and the bottom right ninja that was teamed up with Itachi in the filler - which makes him canon. The rest are dead since they are brought back by edo tensei

Never said otherwise, but I just gave you proof that at least one of them survived (the other one joining akatsuki is not in the manga), while you cannot prove that the rest died there. Them being dead means nothing, they are ninjas, they are human and it was a war period, very high chances of them dying regardless of Dai.

OT: Since Dai went against the fat guy and the latter survived, only to be killed by Kisame himself, that would make it quite clear that Kisame wasn't refering to Dai as one of the "two"

 

[Nerosmoke]

I think it's stated shy fought the seven swordsman and sacrificed himself but I think this was before kisame was a mist swordsman

Fuguki was on that that team. and he won.

 

[Shogo Makishima]

Def Day since he 1v7’d the mist swordsmen

Next is prob Obito since he knew his true nature

Obito special ability is slipping thru attacks. I don't think that equates to being skilled in taijutsu