Marshall. According to the BR, and I apologize for the lack of link as I am on the road. Perhaps another can provide it, but they ranked the top 100 CBs. Smith was in the 70s, Davis in the very early 20s and Marshall around 14. Thought I would share. Hopefully someone at home can provide more detail.
http://bleacherreport.com/articles/1118304-br-nfl-1000-top-100-cornerbacks I was shocked to see how highly they considered Marshall
Never be shocked with Bleacher Report. It is not real journalism. If I'm not mistaken, they had Kyle Rudolph ranked ahead of Jermichael Finley at TE. They also had Tony Gonzalez ahead of Vernon Davis and Antonio Gates. Anyone with a computer can write for Bleacher Report. You don't even need to know how to use it.
Yeah also has Nolan Carroll ahead of Devin McCourty lol, and Jason Allen in the Top 50 haha, this list is a joke.