I would probably not make any trades if I had that team right now. The only way you get a RB even close to DeAngelo (And AP is miles ahead of him), you would have to part with one of your stud WRs like Miles or Marshall. The only RBs your going to get for Bowe, well, guys like Charles - TJ - Green, kinda middle line, bad PPR guys.
I said Bowe, cause I believe he is a bit below the clear two studs at WR, and way above the rest. He should have a few good weeks coming up, and then you can try shopping him around a bit more, so I would wait on that if I was going to trade for a RB.
But unless you have a flex spot, I still would not make a move. If AP goes down, NOBODY replacing him, thats just horrible luck. Hopefully if DeAngelo goes down, Pierre is back by then.
As for Stafford, I still think you can drop him and pick him up later. But he is not starting over Flacco ever for me, and Flacco gets Houston-NO-Cleveland in week 14-16! If your that high on Stafford and/or that low on Flacco, try adding Flacco in to the deals, and mention his sweet sweet Fantasy matchup. Thats the Houston team who made Cassel look like a pro bowler.