The rest are all 'winnable' in theory (but what game isn't in the NFL?).
If Jones isn't back yet for the Giants that one should be a W for sure. With Jones, they're capable of beating most other teams including the Browns. Their defense is tough, and offense is just good enough to be a problem.
I agree TN is a big test, but the Ravens game may be more important in terms of making the PO's. I think if you go 10-6 and lose the Ravens and Pitt you won't make the PO's. If you go 11-5, beating NY teams and Ravens, you make it in.
Chubb and Hunt are the best 1-2 punch in the league, and it's not really even close. They're a big reason Browns are 8-3.
I have a bad feeling though we're looking at a dynasty with Reid and Mahomes though. Patrick ... is freaking insane. As a Raider fan I hate to say it, but KC has the best QB I've ever seen, and I've been watching the NFL since the early 1970's as a little kid.
They've lost 1 game in the last calendar year (to my Raiders thanks very much!) and we BARELY won. Could've gone the other way easily. They are looking monstrous right now.