Trent Richardson easily.
Let's look back to 2007 when AD fell into the vikings laps. At that point RB was arguably the most solid position on the team outside of DT and G. People forget that Chester Taylor was a 1,200 yard rusher the year before and would have been more than capable of being a solid starter for another year or two. The thing the vikings didn't have though, was a game changer on offense. So the vikings took the physical freak in AD and we all know what happened from there.
Cleveland's situation this year is very similar to Minnesota's in '07
The point is that with a pick that high, you don't draft for need. You draft the guy that's going to be the superstar. You can get quality guys at positions of need later on in the draft, you can't find the freakish talents in the later rounds that will be available in the top 10. Right now, Cleveland is in the same situation that Minnesota was in five years ago. They don't have a guy that can score on any given play and break a game open. While the browns might not need a RB, they do need a playmaker and Trent Richardson is probably the best one in the draft.
sig by BoneKrusher