Bill the Lobster >>> The twenty random students who appeared on a few single pages
Also, I wish Cerebro's X-Men lasted more than two issues. X-Men #80 & #360 were some of my favorite issues, but characters like Grey King, Xaos, Crux, Rapture, Mercury, and Landslide were awesome. They don't really exist so I wouldn't nominate them.
"DiGiorno's for the oven, Totino's for the microwave... and the memories are for us." - Angela Giarratana
Tom Corsi is the only one of them I'm familiar with, but the whole "white guy being magic demon bear'd into a Native American" thing is a little off putting.