Lex is kind of like them all but not really.
He has a battle suit but he is so not iron man. His best suit is actually Apokaliptic.
He's only like Osborn in that he's rich: he doesn't do fighting himself and he isn't crazy.
He's like the Kingpin in that he's rich (and bald) but half the time Lex isn't anywhere near as strong or intimidating and most of the time he's not even a criminal.
With all that said he's the furthest thing from Doctor Doom imaginable.
I'm really not a Lex fan, the overwhelming majority of his stories feature him as nothing more than a vector to introduce kryptonite. I guess that's why I can't get huffy about any deviation from canon in his portrayal.