I think that Chance Warmack did the best at the 2013 NFL Combine, because he had the highest grade of a 95.9. Chance Warmack is a guard from the University of Alabama and he went to Atlanta's Westlake high school.
Another top player at the 2013 NFL Combine was offensive tackle Luke Joeckel. Joeckel attended the University of Texas and his grade was a 95.3. He left school early to enter the Draft and he got a lot of publicity.
I think that this year's draft may have the most linemen in the top ten picks, and the big guys will finally get their due.
This year's NFL Combine didn't have many big names, but it did have quality players. Many linemen really showed off their skills, speed, and agility.
As a side note, I think Montee Ball could also be a first round draft pick. Although he did not do well at the 2013 NFL Combine, he was the all-time NCAA career touchdown leader. Because of this, I believe he has a big chance at being being chosen in the first round.