Moats is one FWP clone. Sophomore player, crazy speed, a great game at the end of the year filling in for injuries (although he also had some crap ones). Westbrook is coming back from injury, and the news on Moats from camp is generally positive. Looking more and more like a RBBC.
A guy in a similar situation is Wali Lundy. Completely obscure. Everyone ahead of him is injured or unspectacular. He's not Fast like Willie, and it's not a great rushing offense (although maybe some Denver magic rubs off on HOU), but if he takes the job and (ahhem) runs with it, he will be a good #2 in fantasy.
I think one of my biggest issues surrounding Cobbs is the fact that the Patriots, a team with a great eye for talent, released him so quickly after having drafted him. Much of what I read about Cobbs was that he has maturity issues and lacks self-motivation. Maybe he'll prove things wrong in Denver, but I find it hard to believe he's going to jump ahead of both Dayne and Bell. But, who knows, really. Pretty much every back who's run for the Broncos has come out of nowhere, so Cobbs certainly fits that mold.
My Willie Parker this season is Dee Brown. Brown is currently slated as the #3 running back in Kansas City slated behind the untested Larry Johnson and injury-prone/possible retiree Priest Holmes. Herm Edwards has gone on the record saying that he wants to run the ball MORE often than last season, with or without Priest Holmes. Dee Brown is an amazing sleeper for next season who is never, ever discussed.