Originally Posted by metaphysician
More than a neck. Reed and Doom are really in an entire separate category, wherein intellect becomes a cosmic tool. Aside from them, though, yeah, I'd be comfortable saying Banner is in the same category as Stark. Stark is higher, IMO, but its not a depressing distance, and its one where Banner would completely outdo Stark in Banner's areas of expertise.
Not so much.
In one of the earliest Stan Lee stories, he stated Banner was the smartest man on the planet, albeit Stan's Hulk stories weren't the most consistent.. In an issue of Hulk in the early to mid 1970's Doom pondered just how smart Banner really was. When Banner was in control of Hulk's form when Bill Mantlo was writing him, Banner created more new inventions than Edison in a shorter time. More recently in WWHs, Banner outsmarted Doom twice.
It has been suggested, but not made clear, that Banner transforms into the Savage Hulk to hold himself back all these years, all his other incarnations, including "Gray Hulk", "Gravage/Green Scar","Bruce" are potentially dangerous due to their level's of intelligence, power and knowing potentially what they can do. Banner allowing his Hulk-self to exist without his hindrance = Worldbreaker Hulk.
As someone said, Marvel's genius' are usually genius' in specific fields.