ALL OF THOSE CHARACTERS WOULD BE SUPER DUPER WELCOME.

I don't know much about canon outside of Transformers... but I think a Skids might be fun to play (even though, wow I want everyone) because he's so impulsive, and that could lead to a lot of unexpected scenarios.

Otherwise from a purely bias perspective, I'd love to see Overlord natter with ALL the Starscreams about Megatron.

And THIS Starscream needs to bully convince someone to stick an organ inside him. Hur First Aid might fit that bill.