Over the decades, which Autobot/Maximal leader was the most "heroic" based on what you believe to be a hero. For me, it's gotta be Optimus Primal. He had no premonition of his battles on Earth and later Cybertron. He was thrust right into them through chance circumstances that were both unorthodox and unfair, but without hesitation and without complaint he rose to the call and he fought relentlessly and valiantly for the greater good because that's just what he had to do. He saved the Autobots and Optimus Prime himself, and then saved the entire Cybertronian race at the cost of himself to ensure the will of the Matrix be upheld. That's my piece, but I'm very interested in what others have to say about the most heroic leader in Transformers animation/film. EDIT: Because of poll limitations, I had to exclude Japanese exclusive animation, sorry.