During the marriage of Sue and Reed, Ben asked who the bald guy was. Sue told him it was Charles Xavier a man "just as brilliant as Reed." Now obviously, Xavier's not quite on Reed's level, but I'd put him above Spidey.
Spidey really is a tough case, because he may have the intelligence to fit the bill, but we're comparing a 28 year old with a graduate level education, and no recognized accomplishments, to Nobel prize winning doctors, time travellers, and total Leonardo Davinci types.
True...at the same time, that maybe personal choice, and the result of the place they wound up in. Scarlet Centurion wound up in an alternate 20th century, some place easy to subdue. Kang wound up in the 40th century. That experience probably shaped him into someone who values war over diplomacy.
If you read Avengers Forever #9, you see that Kang is a capable leader+ Governor.
Dark Beast is a better geneticist than regular Beast, but Dark Beast doesn't have the overall scientific knowledge that his 616 counterpart has; I guess you could say Dark Beast's genius is more concentrated in one area.
Yeah, ****, if even Kitty Pryde (who I consider to be a minor genius by Comic standards) was in our actual world, she'd probably have a 160 IQ, yet various handbooks list her as gifted. As for highest recorded, it's like 216, but Leonardo Davinci is believed to have had an IQ well into the 200s.
I have a genius IQ too (148). Unfortunately, here we are...both debating the intelligence of fictional characters.