I'll tell you what OGs are still here since that's one of the things I'm good at.
Me, Spire, Wallhammer, Drizzy, LucotIC (although he's still banned), Chara, Asriel, Potat, Kit, Bread, Purple, Giraffe, Eclipse, Cinna, Venus, TheHugePig, Shotgun, Doggie, Behapp, Delted, Salem, Bazooka (yes he came back), Cheez, ContentDeleter, Auditor/mano (currently man_of_seven_shingles), Crunch (currently Y2K.J), Soul, Elias, Akifhaziq, Rotisserie, dicewarrior, TBMR, Wubbzymon, Badtime, Jtohisgoodimo, Yoshi, Frost and Bombhands (in dms)
There's probably more but I forgor