Yeah, Iron Heroes would definitely be on the list along with Arcana Unearthed/Evolved.
IH basically was about bringing the power back to the player that was not reliant upon cool magic items or spells as well as an empowerment to the somewhat ignored martial classes.
AU/AE was an excellent alternative PHB that brought some interesting concepts to the forefront: racial levels, the universal and non-Vancian magic system ("who knew so many players did not like the Vancian magic system?"), and I also think that the flavor of the races and classes spoke to players who wanted a change and after AU/AE were ready to kill some of D&D's sacred cows.