I like them all, but it depends who is available when time to pick. McKinney is my favorite, but there are bigger needs at 39, and he will be gone at 56.
I will say this, do not sleep on Kyle Dugger. I have seen the kid play several times in person, he has a ton of skills. Please do not mistake me here, I am not saying he is as good as Isaiah Simmons, but i could see him in that mold. Simmons is a LB who will play a lot of safety. Dugger is a safety that could play some LB.