Maybe it’s too close to the popularized MCU iron man depending on what you want, but I enjoyed the 6 part Extremis series beatifully illustrated by Adi Granov. It came out 05/06 and you can see how much the movie lifted in origin and appearance and of course they derived the iron man 3 stuff from here. Very science fiction-y.

There’s a collection of the “Armor Wars” series which is one of the iconic Iron Man storylines.

https://en.m.wikipedia.org/wiki/Armor_Wars

Demon in a bottle. Classic iron man dealing with his alcohol problem.