Its really hard to say any other team besides KC.
It should be interesting this season with 4 games vs the AFC North. They could go 4-0 or 0-4, it's a good litmus test.
The Browns actually had a solid draft outside of those QB picks. Two solid RBs, two top-rated defenders.
The truth is nobody really knows how much these 32 teams will improve or not until they get on the field.