What would you consider Steven Jackson's prime?
2006. While he may not have been the pass-protector he was in his later career, he was good enough, and he was simply too big and fast to stop. And his pass-catching abilities were second-to-absolutely-none in that year.
S-Jax was unstoppable in that year, and having him in that year with Gurley would make opposing defenses quit in the middle of the third quarter. That's not even counting Cooks, Woods, Kupp, and our underrated offensive line and tight ends. That's GSoT-lite right there.