I don't like any names on there until you get past the top 10. Top two will cost too much and 3-10 aren't worth the money we'd pay them as a backup.
I say draft a RB and Stewart and Mendenhall look like a Whis type of back. 224 and 230lbs with a 4.4 is a great combination for each. Both had great games against the weaker teams and struggled against the better opponents. Stewart still managed to do well with a Leaf throwing behind him too. From what I can see, what puts Mendenhall ahead is that he is more of a power downhill runner which I know Whis likes. He doesn't stutter step and hits the hole hard. Stewart is tough to take down also and will keep the legs moving until the whistle blows. I think it might come down to whichever back blocks better at the combine for Whis. I say flip a coin, I'll take either one.
Taking a RB in the first round is the smartest thing the cards can do because whoever they take, they'll have a year to learn under Edge.
I like the rankings and analysis here.
http://www.nfldraftcountdown.com/rankings/rb.html