Packers.
There's one thing people are overlooking with the supposedly "almighty" Bears defense; they made their living off turnovers. They led the league with 36 takeaways, a significant amount ahead of the #2 team (Cleveland, 31)
High volume turnover rates generally aren't sustainable year to year, so i expect the Bears to crash through the floor, especially with a still lackluster offense. The Vikings will continue to wade in mediocrity and the Lions are the Lions, leaving the Packers as the best of the rest, really.