I JUST found this wave today at a grocery store of all places (Why is it that they get better figs than the big stores?).
Anyway, I will agree that Dengar is the best fig from the wave. Lots of detail, a great paintjob.... it looks just like its movie counterpart. My only complaint would be that it has no knee articulation, but that doesn't take away from the awesomeness that is Dengar.
I disagree with your stance on Bossk. He seems perfectly normal to me, and is about the same thickness as his POTF2 counterpart. The articulation is good, as is the sculpt. IMO, this is a GREAT figure, and well worth the money. My only gripe is that his hand is too big, and he can't hold is blaster tightly.
As for Ozzel, I think he has a good body, but the headsculpt is kind of dull. It could have been better, but I still think this is a good figure, and a welcome addition for my Imperial Army.