Tankersley has a ways to go. We probably won't know very much on him this year. Despite being thin at CB he is inactive today.
Even if Tankersley shows something this year, I think corner could be the top pick. Looks like there are some good first round corners, plus you can never have enough of them. Of course, pass rusher has to be up there as well. Either San Diego has a great offensive line, or Miami may struggle getting to the quarterback this year.
One last point, I like Howard but we don't know if he's a number 1 guy yet either. This year will answer a lot of questions in terms of young talent. At least we know Gase will play young guys.