>>5721206I feel that you have a pretty good frame to take your pick.
Any voyager from HFTD would be good; if you can stand bayformers; Recon Ironhide, Bludgeon, Mindwipe, Seaspray, and Payload. All good figures.
RTS had meme figures like Lugnut and Perceptor. Also make sure to get any scout you like from ROTF, RTS, and 2010.
You'll also need Strongarm to complete the land-based Energon autobots. The 2007 movie line had several repaints of the Energon and Cybertron scouts.
I'm not that fond of Classics but there was Onslaught, Hound, Mirage, and Optimus which were the best of the line.
Early Generations had WFC Optimus and Megatron who are still some of the best of the line, and the Thrilling 30 part of the line had Springer, Sandstorm, Skids, and Scoop for some reason.
You didn't mention Prime but First Edition Bulkhead is just fucking amazing. YMMV on FE Optimus but I really like it and it looks powerful just standing there on a display.
I was never interested in Cybertron but /toy/ loves that line so just wait for someone else to make recommendations of it. I think their Scattershot was a big, chunky missile carrier and their Menasor was some sort of monstrous sports bulldozer with drills and a cowcatcher on the front.
