KingD19
Shai-Gen's Enigmatic Wong
But he was strong enough to sling around creatures that weighed several tons, slam then into other GECKO units, and didn't slow him down for a second.
It's not like Iron Man is exactly fast when it comes to reflexes. Raiden is definitely faster than him. And lets be honest, they made Vamp super OP in that game since they were gonna kill him off at the end. Him beating Raiden directly contradicts like all the feats he has in MGS4.
I'm not sure if Tony would be able to try and hack him in the middle of a fight with someone massively faster and more powerful trying to kill him. Or if his tech would even be compatible, as Revengeance tech seems to be infinitely higher than anything Tony has at hand aside from his Arc Reactor providing nearly unlimited energy(which it can't even do for his suit)