This one is a bit unusual, in that it is purely a Costume Con, or in fact the 28th Costume-Con held in Milwaukee, WI. All flavors are welcome; Cosplayers, Furries, Historical Reenactors, Theater/Movie costuming professionals, and many other variations. The events appear to be arranged by temporal shift (past, present, future), and does appear to include a predominance of genre groups.
There are also a few 1 day Comic-Cons (basically just Collectible shows), including Hickory Con in Hickory, NC, JMV Comic Book Show in Fort Worth,TX, and the Clifton NJ Comic Book Expo.