Him, Catmando, Yourself, Blaster, Metadigital among others stand as some of the most intelligent people that ever graced this forum. They can actually rationalize and argue logically unlike most people in internet communities.
I'm pretty sure their has been other people, but you just haven't cared enough to look for them, or they just don't post. If you're talking about smart 'OTters', than I guess those people would make sense. If that is the case you also forgot Cynicism, because he claims he has an IQ of 187 or something along those lines.