Well, I guess I can't really disagree with your point that Furman likes to use obscure characters.
One of my favourites from later in the Marvel run was Carnivac, the Decepticon who sided with the Autobots after joining forces with the Wreckers during Time Wars, and then meeting up again with the survivors. There was a great little run in the UK back & white stories. He was pretty obscure.
The only other appearance I know of was when he and Snarler were sent after Spike Witwicky whilst he was on a skiing holiday.