When it comes to creative/inventive genius, I think I might put AIM and Tony Stark (and perhaps even Victor von Doom) ahead of Reed Richards.
Look at the accomplishments:
AIM
Super-Adaptoid
Cosmic Cube (a device for altering reality)
MODOK
Tony Stark
Can't even make a list: just too much to name. I mean look at what he did with his extremis tech...
Doctor Doom
First functioning time machine, active forcefields, genius robotics designer (life-like constructs), armorer, and able to steal the power cosmic to use for his own purposes (which he did more than once).
Aside from unstable molecules (which is a big deal), redefined both space travel and microscopic travel, and discovering the Negative Zone what long-lasting scientific inventions/contributions to Marvel's universe has Reed been responsible for?
Somehow, I still think Reed is the most intelligent character in Marvel, but as far as creative genius goes, he may come in fourth behind these guys. What do you think?