I agree with you on most points you made here (add Troy Polomalou if I spelled it even close).
I don't get too into draft research, but kinchens name has popped up a few times and he does seem to fit the bill based on what I have read. But one thing you miss. You don't need to have THE BEST guy at playing that role. You can have a guy who is "merely good" and be successful if you generate pressure. If you have good coverage. All defenses are based on not having breakdowns and doing enough things well that the other team can't find success. You can stop the pass with great coverage OR getting to the QB. Or you can be really good at both. You can't suck at either one.