Corty is probably my favorite character, more because their POV is the most fun so far. I also like how Paul is portrayed when he pops up. I'd like to see a chapter from his POV at some point.
There are a handful of individuals I would like to see, however, but they haven't been added to any chapters yet. A Puppet POV would be pretty interesting, along with a George POV. A Puppet POV would be rather chaotic, though, so it would take some higher level writing to get the sort of atmosphere I'd expect out of such a chapter.