I would put in another vote for some of the Durango paddlers (shitouta a.k.a. Ben, the Klema brothers, etc), as well as Xavier Engle. Xavier is sponsored by Fluid so he wouldn't quite fit this unsponsored criterion, but he still flies pretty low but has some major skills.
Hell, since this is basically turning into a shoutout to all the paddlers that I know that are better than me, let me also suggest:
Will Parham from Idaho
Alex J Wolfgram from Auburn California - the most interesting person that I know. I once filmed a day in the life of Alex Wolfgram to try to make a documentary about him, but it quickly became apparent that the footage was so incredible that we would need to produce a 25 hour movie for just that one day, and I gave up the project.
Dave Ernst from Germany
Jakub Nemec from, well, I guess he lives in colorado right now? Or maybe the Czech republic.
You know what? Those other names are good paddlers and all, but Alex Wolfgram is the man to talk to. PM me and I can give you his phone number.