No one active here, probably.
TriReM used to be active here a while ago. He and T90 have collabed on a few community games and from what I gather, he's one of T90's go-to guys for mods and game tech stuff. He seems to be pretty well known within T90's twitch community, anyways.
Aleph used to be active here, too. He and T90 co-casted an AI battle with his Illuminati AI which used to be active on the AI scripting ladders around here.
Other than that and the occasional shout out to this place from Spirit of the Law, I don't know of anyone else. Then again, I don't follow every streamer and YouTuber so I might be missing a few...