Spoiler Alert, click show to read: 
atheotes
Askthepizzaguy (one game at a time)
Beskar
Caius
Cultured Drizzt fan(large games only)
Captain Blackadder
Chaotix
CountArach (Huge/Large)
Cronos Impera
Gaius Scribonius Curio (Huge/Large)
Glenn (Huge/Large)
Greyblades
johnhughthom (Huge/Large)
'khaan (large)
Lord Winter (large)
Iskander 3.1
pevergreen (large)
Son o' Caledonia
spL1tp3r50naL1ty
Thermal Mercury
Tiberius of the Drake (small)
Tratorix (Huge/large)
Warluster
Warmaster Horus
woad&fangs (small)
Yaropolk (one at a time)
YLC


Is there anyone on this list who hasn't been invited?

I'm looking at Cronos Impera, Glenn, Son o' Caledonia, and Warluster. I know that Thermal isn't around anymore.