1. Bills (4-1, last week No. 1): There’s currently a gap between the Bills and everyone else.
2. Cardinals (5-0, No. 2): The last unbeaten team still has work to do to get to the very top of the list.
3. Buccaneers (4-1, No. 3): That loss to the Rams was more of a blip than it appeared at the time.
4. Ravens (4-1, No. 4): The Ravens discovered their passing game, by necessity. That could take the offense, and the team, to new…