impossible to choose only one!
you are probably getting to know Victor Emerita, Jeeprs, Krumple and Sometime, they have been the bravest. JG Weed, Theatetus (probably spelled that wrong)Khethil, are some of our former moderators, all great guys, in fact all our moderators were, meanwhile making great contributions to many threads. there are some guys who probably wont make it here that i will miss like anything...or maybe they left the old forum and will come back now, who knows? whatever happened to dudymos thomas i wonder...he impressed me from the very beginning because he seemed to come in and take the side of whoever was being attacked by some ignoramus.
for now i would say to check out on our old threads PaulHanke and Dave Allen, they are the guys who really have a handle on reality. i believe a serious thinker can blow an academic theory out of the water like the kid who noticed the emperor was naked. HueMan was always one of my favorite posters, also a real kind of guy, and into ethics which is my current focus. For a more metaphysical view, there is Prothero, master of some of the most profound concepts.
i could go on forever, i would have something good to say about every one of the old crowd i am following on my profile page=-nearly 70 of them. but you did ask for one!