Fel or Tram?
M!S I believe does Peerless, maybe some Tram spawns. Haven't seen them in Fel.
Spawners Inc. does Fel spawns/tram... peerless and Doom on occassion. Doom is kinda dead nowadays.
*CT* spawns Despise early morn since they're Asian and have the time difference... some PvM on at that time. Their 'alliance'.
Not sure what other Trammel based guilds do Peerless/Doom.
But as far as doing actual Fel spawns, it's pretty much just SI. Everyone else only raids spawns. They don't really ever do their own. Unless it's a harrower they planned, and didn't raid. But more often than not, SI holds off any harrower raiders.
There's a few guildless people that are always doing Ilsh champ spawns... but not sure what other guilds spawn/peerless. Not in Tram much to know.
