In that order, you need 3rbs to finish a year in FF. after bye weeks trade one if you have a hole to fill.
SJax could easily be a rb1 on the right team, forte is a beast in ppr leagues. Spiller is your best player.
I personally like witten over Hernandez but it close.
Walker is the best blue chip in ppr format but if he does not resign in NE. Wasted spot for sure