If I ever got into customizing/kitbashing Transformers, I'd like to try doing a take on the Mighty Orbots. idk, I can think some old Combiner Wars/Power of the Primes figures would work for them.
The Optimus/Motormaster torso would fit Tor, the big red one, pretty well.
Bort, the skinny blue guy in the back, transforms from a jet during their combination sequence, and he isn't exactly spoiled for choice. Let's go with Blackwing.
Boo and Bo, the yellow and orange ones, unfortunately get saddled with that godawful POTP Moonracer mold depending on how accurate I'd want them to be. Maybe the Alpha Bravo mold instead?
Crunch, our other big guy, could maybe work with Rook? Maybe Blot? I was thinking one of the Dinobots, but none of them have any real heft in POTP.
And Ohno, who acts as the ignition key for the team's combined form, could easily work as either one of the CW chest plate bots or a prime master. Dunno what I'd turn the armor into though. None of them seem especially fitting for Rob.