Yeppers, I've seen Kurt:)
And I've seen Odie sing live too. (FInally... after twisting his arm for over a year)
But that's it, only those two. (and Kurt, you rock... no, you
swing... well, whatever, you know what I mean)
From what I've seen, even with friends/family I've heard on recordings vs. live, EVERYone is much better live.
.