In the NFC: Buccaneers and 49ers concern me the most, maybe the Cardinals once they get their #1 WR back, whom only played a handful of snaps against the Packers but we didn't seem to be able to stop him but he was injured before the game, and reinjured during the game.
But I think the Buccaneers have the best defense to stop the Packers offense in it's track, and when the offense gets stopped the defense gets worn down.
49ers, because if they're hot, they were breaking a lot of tackles and extremely physical and can force the other team to make a lot of mistakes.
Cardinals because they have the best road record in the NFL, only losing one road game all year long.