Unicron. (eats moons.)

Battle Unicron (ebay legend)

Scourge (The conection I'm going for is both Uni and Scourge have beards, but I know one was created by the other as well, but that's a boring conncetion!)

 

Goki, I've checked, Prowl does indeed take possesion of himself, inorder to battle Megatron who has taken possession of Snaptrap. And yes he has to ensure he dies at the hands of Starscream after he's taken care of Megatron, so that the future isn't altered, which is what Megatron was trying to do in possessing Snaptrap, save the Seacons from Starscream. Phew!

Bludgeon (also named after a way of hurting someone)

Spinister (a fellow member of the Decepticon Mayhem Attack Squad in the UK comic)

Maraudimus Prime

 

(Spinister appeared in the DW Armada "When Worlds Collide" storyline, as the sole survivor of a world on the brink of destruction by Unicron. Maraudimus Prime was the Optimus Prime of that world, and was send to the DW Armada universe as an early warning, and a method of terror, by Unicron. In other words, Spinister and Maraudimus Prime are the only known characters of that lost Universe)

Sentinel Prime (also a Prime who died in a comic)

Primon (Also a Legendary Leader)

Liege Maximo (is believed to have killed Primo)

Leonicus (Member of the Covenant, who witnessed the event of the Leige Maximo killing Primon)