Joieque Bell Shane Vereen Bishop Shankey Bernard Pierce Blount James Starks Dez Bryant Brandon Marshall (these two are the obvious choices) Pierre Garcon Golden Tate
Your running backs are limited for now, so Bell and Vereen are your best 2. I'd also add Garcon. I know the Redskins passing game is crapty, but Garcon will still get his. I think Walker is the way to go. I've been a fan of his all summer.