Jhiaxus

Jhiaxus was a mad Decepticon scientist who believed in racial purity. I.E all Cybertronians must be purely mechanical and all living beings must be Cybertronian. Shockwave attempted to kill him after he took control of the Decepticons but Jhiaxus escaped. Jhiaxus would then found his own empire in the unknown regions. Liege Maximo offered his support and was eventually made the supreme leader of Jhiaxus' s empire with Jhiaxus becoming second in command. His empire would attack organic worlds and cyberform them into mini Cybertrons, eventually forming a massive space station known as the Hub. At some point he captured the Autobot Arcee and tortured her... among other things. This would be his undoing however since Arcee hunted him down, tore down a large part of his empire and killed him on some barren moon. He also cloned multiple top Decepticons including Darth Megatron, Starscream and Soundwave. One of the Soundwave clones would eventually join the Decepticons as SoundBlaster.