T. Davis has always seemed to fit Carolina's WLB spot than Beason...for whatever reason. His recent success doesn't mean he's better than Kuechly though. Kuechly's a beast. I haven't had the opportunity to watch many of their games, but I'd guess Davis' success is a result of other teams scheming Kuechly. I think Davis having success helps Kueckly down the road.
Now for your question.
IMO, Davis probably has a higher ceiling (week to week) than most of the guys you have, but probably a lower floor too. Not to mention that Davis' biggest problem, which has been health. He's pretty good when healthy, but doesn't usually finish the year. Kind of the Darren McFadden of defense. I think you can flip a coin on most of those guys ROS. Maybe the Guru has a more definitive opinion. Good luck.