If you go the chuuni route, I've got a fellow chuuni (even though he's got reasons for it, Kidou please). In canon his standard outfit involves wearing goggles 24/7 - we have actual scenes with him asleep in them - and a cape when playing soccer. He takes himself incredibly seriously. Everyone else takes him incredibly seriously. It's kind of amazing.

His AU self, Michi Yamashita, isn't exactly one, though he does drift from hobby to hobby and through clubs in some attempt to learn literally everything. He half counts.