I was a member of STFVeterans for a while and ran a few missions with them bit got Kicked because I joined before they closed their Channel. I can shovel out ~5K DPS with 2 of my accounts, 4.5K with the third. I only do Space STFs (And really only ISE but I am very good with ISE). And am sick of PuGing.
Can post Pics or Video if you want. Can also run a few games if you hit me up at @sdkraust
"PublicEliteSTF" is probably the most active public stf channel there is. "Elite STF" is being pushed by some, but is too quiet to be useful right now.
Though for private channels, "EliteSTF" is the best. The quality of players is only slightly higher than using the queue system in terms of getting optionals, but I have yet to fail an actual STF completely when running from people there. So 100% success, 50% optional success. Be warned though, the admins there are quick to kick/ban and have some pretty silly rules, but as long as you're not strong-headed, it's not that bad.