I might put Coles and Jackson a notvh below the rest, but I really wouldn't worry too much about getting the rankings exactly right. IN draft, you'll get a shot at no more than two of these guys in all likelihood, and maybe only one of them. Then you'll just have to take a pick between two.
The fact that you're considering it now bodes well for when you have to make a decision on the fly. Be well-prepared and well-informed and pick from the gut.