It was hard to narrow it down to a top 5 list, but here are some that I've thought of before I saw this thread.
@birdsandbats - A much better Midwestern birder than me, and I'm frequently in Wisconsin.
@MRJ - I'd love to visit Moonlit someday, and his big year thread entries are also quite impressive.
@Sicarius - For the number of cool new species he uploads to the gallery.
@vogelcommando - It was a pleasant surprise he was the one who started the thread, and the number of species he has seen and even taken care of is incredible.
@Lucas Lang - He is able to get really great shots of amazing wildlife from all over the US.
There are many others I'd like to meet, especially fellow Illinois or Midwest/great lakes zoo nerds. Perhaps we can have a meetup when the Brookfield Zoo finally starts opening some of its new exhibits, an idea
@pachyderm pro had when we met (The second Zoochatter I've had the pleasure of meeting in person).
Of course, I'd like to meet just about any other zoochatter, and if I'm able to do any serious zoo trips, I'd love to visit zoos with a local zoo nerd.