You should do Paddles. The thing with Paddles is he does not have a robot mode, and imagination is great. For example, the front paddles can be blades, or he could have a face plate. He can be stacked with weapons.
Okay whe have Pop Grimlock, Astrotrain, Combaticons/Bruticus, Chromia i think or Moonracer, Optimus Prime, Megatron, Blitzwing, Blackarania and Dinobot