Blood for the Baron!

Protectobots + Technobots = Protechnobots?: Afterburner, First Aid, Hot Spot (KO Onslaught as a rescue vehicle), Lightspeed, Nosecone and Streetwise.

Stunticons -1: Breakdown, Drag Strip, Motormaster and Wildrider.

Breastforce (Decepticons, despite lacking the "con" suffix): Drillhorn, Hellbat, Jargua, Leozack (subteam leader), Gayhawk and Killbison.
There's also Ransack, a non-Cybertronian Transformer from Planet Speed. I'll post the other non-Cybertronians later.

Enough of subgroups. Time for the attack of the clones!
Nemesis Prime and his clone allies: BlackAriel (Animated Blackarachnia), Magnificus (Legends Onslaught), Nemesis Prime (at center, just like Optimus and Zarak), Movor (KO Blastoff) and Sunstorm. Sorry for the blurry pic and I know these ones should go with the "normal" Decepticons, but I wanted to show Nemesis' closest allies.

Unaffiliated: Lockdown, yes? and Sideways with Mirror (the fusion of his Mini-Cons Rook and Crosswise)

Non-Cybertronian Transformers: Dive-Dive, Flip Top, South Claw and Zero from Gobotron; Brimstone, Leobreaker and Scourge from Jungle; Sandstorm (KO Cybertron Evac) from Paradron; Override and Dirt Boss from Speed.

The 13 (well, three of them): The Fallen, Logos Prime (KO Cybertron Soundwave) and Vector Prime, with Cybertron as a background.

Minions of Unicron: Mini-Con Dead End, Gnaw and Energon Sharkticon, with Unicron as a background. That's all (save for a few ones that are lost among lots of generic KO, but almost all of these are other versions of the same ones shown here, so it doesn't matter).

Wow nice pics DA. Is there a Nipplebot subgroup of Breastforce?

Wow! I'm no expert on Transformers but I'm really impressed DA!

I never knew the made Unicron into a toy..!?! How cool!