Doc - he used to post quite actively..and though I didn't agree to most of what he said, but it was a million times better than teens bickering shallowly on personal half-egos.
Anonpak - haven't seen him posting live, he was here prior to my registeration but I've come across his posts and they are worth reading.
Trueye - the guy doesn't post as much as he used to, and despite not agreeing to most of his comments, they weighed more than the puns we see nowadays on the forums.
I'll try recalling and post a few more here.