Plus with the strength to take hits from the Hulk and the speed to counter him even. I still feel like the Iron Monger was a technological dead end. Too clunky, slow, would have been picked apart in seconds by the big guy. Gatling gun? That's cute. Tony's got lasers and lasers are probably the only earthly thing that could even scratch Hulk.
Don't get me wrong, Stane is a great villain, but in the greater scheme of things, if he had won in IM1, history had taken a different course, and it was him fighting the Hulk, he'd be beyond screwed. Stane lacks the vision, innovation and proxy to make anything even close to the HB. Or even to hire someone to attempt to design something close.