Legion Dethtoll or BlooddancerLegion, one of the two. Think Legion was the artist, and Bloodancer was his friend or something like that. That was his username. Took a while of digging in the wayback machine, eventually made a breakthrough when I remembered, it wasn't always padnd.com, it was planetadnd.com before that. Random clicking through archived pages of the Arts and Lit board finally snagged me a partially saved thread of his Adventure Ho! comic he did, with characters based on forum users.
Here was his avatar!
And here's a compliation of a bunch of the avatars he made:
Whew. Glad to have that burden gone. That was going to drive me nuts for days.
On an unrelated note, after spending a few years of hanging out on Reddit, I gotta say, I missed the personality this little board has. Reddit is so sterile, censorious, and filled with ideological assholes from end to end. At least the ideological assholes here had personality, and not just a bunch of mindless NPCs!