As Steven Jackson's biggest fan on this site? He'd be right at Marshall and ED. I've never seen such a big, physical, punishing bellcow of a runner with such breakaway speed, soft hands and slick routes in the passing game, as fantastic a pass blocker as I've seen, and with ball security (even though he'd always keep the football in his right arm, no matter what, he almost never fumbled).
If McVay had S-Jax in his prime, we'd have won that Super Bowl against the Cheatriots, would've won the Lions playoff game last year, could've possibly won more Super Bowls in his career, along with Stafford.