bouncymischa
Synthetic Genie
Although Purity is the one that relies on technology and won't enhance a person to get the results it needs, so it's closer to Iron Man if you think about it.
I'm not terribly familiar with the Marvel universe... are there any cyborg heroes in it?
Although, Iron Man does have an arc reactor cybernetically implanted to help keep him alive, and I believe after the Extremis arc doesn't he get his armor cybernetically implanted into his bones?
Out of the prominent Avengers, Iron Man is the most cybernetic, at least.