My list would be very long. There's a few people no longer here who I see elsewhere in cyberspace such as Dusty, Psalm91, Pastor Gary, InHisLove, RevLynn, AdoptiveMommy, and maybe a few others I'm forgetting at the moment.
Let's see how many I can think of off the top of my head:NearertoGod, Padelford, Tavy, RideForTheSon, ThreeNails, Whirlwind, WhoamI, Mark18, AngelicRose, CoveredbyGrace, Popow Ully Cytorues, Etty, HonestJeen, Gemma, SweetSurrender, Theophilus, ForgivenWretch, Ginger, KitsapGirl, Gods_Child, and there's more. There's a few names I'm drawing a blank on for some reason. Some have checked in fairly recently, but haven't posted in a long time.
I know in your OP you said those that have left here. Many on my list and those I haven't listed are still technically active members, so they haven't left, but in any case they haven't posted in some time.