The Vikings clearly need someone to step in for Chester Taylor. There are rumblings about Albert Young taking over for Chester, which isn't a bad option, but I think they need to add more depth behind Adrian Peterson than Young and Ian Johnson.
If they avoid free agents like Brian Westbrook and still have a hole to fill on draft day, I think Hardesty makes the most sense out of that second tier group of running backs. He is one of the best pass-catching backs in the draft and is certainly capable of excelling in the zone scheme that Minnesota runs.
Dan LeFevour, QB, Central Michigan - I think the Vikings can wait on a QB if they don't snag one in the 1st. LeFevour might be a good fit, but I don't see the logic in reaching for him when there is a pool of QBs with similar value - LeFevour, Jevan Snead, Tony Pike, John Skelton and Jarrett Brown.
Joe McKnight, RB, USC - It comes down to preference and it is possible that the Vikings brass could favour the speedier McKnight over the all-around back in Hardesty.
Rodger Saffold, OT, Indiana - Saffold is a bit of an under-the-radar guy who will likely be a second-round pick, but has the potential to be a good starting left tackle in the NFL. With the surefire run on tackles in the first, the Vikings might get lucky and have him slide to them in the second.
Dorin Dickerson, TE, Pitt - Though the Vikings' questionable investment in Visanthe Shiancoe has certainly panned out well, they don't have any receiving threat at TE behind him. Dickerson is a dynamic athlete (4.40 forty) and a versatile player with underrated blocking abilities. The Vikings could certainly find a way to utilize his unique skill set.
Notes: Many feel that the Vikings will select a safety in this draft and that Morgan Burnett would be a great second-round pick if available, but I just don't see it. Last year was Tyrell Johnson's first year as a full-time starter (only his second in the league) and it seemed like things started to really click as the season went on. They knew he was a developmental player coming in and to give up on him this early would be foolish. Also, they have three backups in Eric Frampton, Husain Abdullah and Jamarca Sanford that the coaching staff seems to love due to their intensity and special teams play.