It's almost as if they set it up so almost every "faction" has a combined.
Starscream/Cybertron: Superion
Optimus/Earth Autobots: Devastator (for now)
Lost Light crew: Defensor.

Not sure where Menasor stands, but after reading the comic with Wheeljack's awakening and Punishment, it seems the 'Cons have created their own guetto, so maybe the Stunticons are there for now.