The Masterpiece editions Optimus, Starscream, Megatron, Grimlock, Skywarp, Thundercracker, and Nemesis Prime, as well as the Alternator line are adequate as well. They are smaller than 1/18 scale, but work out okay. They look small in vehicle mode but look fine in robot mode. I have the Masterpiece Optimus and a couple of Alternators and they look both realistic and awesome when used in combination with Joes.