Title sounds dirty haha. Ahhh I'm tired... anyways, out of the w15'ers that I actually know/remember, I'd have to say Toxic moon of course, great player, leader, and friend.
Also crankster (I just remember chatting on skype while he had like 18k incs from tH or something like that, don't remember how it turned out but still, at least he stuck around instead of just setting a ton of sitters or crying for support like most of the modern n00bs do...)
When I actually played tw with ToPaT, he was still newer to the game, hadn't gotten all the finer points, but from what I hear, that has changed now, and since I don't know many others from w15, I guess he makes the list.