KennedyMarx
Omono
Since I have yet to go to a bonsai show, I've only been able to look at displays of trees online. It seems like they're dominated by junipers and pines, with the occasional flowering tree on display. Even big names in the bonsai world seem to just deal with conifers. Chinese elm was recommended to me as a good tough tree for a beginner to work with, but I don't seem to see them displayed very much at all.