@Sleepy Yep,
some of the others I remember are: the really notable ones everyone remembers anyway(like Aura24, bionicle, kappa, etc), ZapNorris, Bean Sprout, Shroomy_Boomy, DinoHex, XSparxX, convexity_spyro, Bolt, and Helsing. I actually did remember Trexroarrr purely 'cause I added 'em to my Activate friends list even though they never seemed active while I was on.
I was on (or at least stalking) dS for about five years somewhat on-and-off, so there are many more who, I'm sure if you mention them, I'd remember them. The trolls there were amazing.