Since a poll was made for Megatron, best to Optimus as well. His Orion Pax design from Spotlight:Orion Pax and Spotlight:Blurr. His Cybertronian design from any pre earth comics. His G1 from the -ations and All Hail Megatron. His updated design from the Ongoing all the way to Dark Cybertron And his new modern design in RiD season 2.