Are we refering to say customising/ kitbashing them into different series or just plonking them there?

If we're refering to the latter I do. I have the following in my CHUG collection
Energon Omega Supreme
Cybertron Metroplex
Universe Devestator (The energon repaint one), Bruticus and Superion
Botcon Razorclaw
Universe SE Overkill and Dragstrip
ROTF Bludgeon
Musiclabel Soundwave
Energon Scorponok
Realgear Booster X10

Plus a couple of quintesson figures

I'm thinking Cybertron Quickmix suits as a hybrid between G1 Targetmasters Scoop and Quickmix, he also came with a minicon Targetmaster