Iron Man is one of the most iconic Marvel superheroes, although this is mainly due to his presence in the Marvel Cinematic Universe. In terms of the actual comics, he's almost always been something of an also-ran next to Spider-Man, the X-Men and even Daredevil. Nevertheless, he's had a decent amount of great stories, some of which were written by a creator known for his work at a rival publisher.
Source:https://www.cbr.com/green-arrow-mike-grell-iron-man-run-underrated-marvel/