nice list, though I would have to disagree with some of these. I would put Cyborg last on this list. And you're forgetting Professor Ivo...he made AMAZO! And Brainiac has 12th level intellect so he should be number 1. I would also put Bruce Banner at number 7, over Tony, by a slight margin. Even Stark has stated that Banner is smarter, IIRC.
Also, if you ever expand this list, you should add Barbara Gordon, Peter Parker, Beast, and Riddler.