Yup, he spoiled us with that epic 2002 class and understandably never lived up to that (as well as inheriting Cooper signees like Smith, Doss, Jenkins). Some comparable talent between the 08 & 02 classes, Brewster-Mangold, Pryor-Clarett, Shugarts-Downing, Williams-Pitcock, Adams-Sims, (talent levels not style/skills:) Sweat-Salley, Stoneburner-Datish, but ultimately too much depth (Hawk, Hall, Kudla, Troy, Holmes, Mitchell, White).
I think Nuge is in the discussion but probably gets left out due to his position.
The later years for Tressel had more Gholston, Hartline, Posey, Coleman types. Still very good players but lacking the elite talent of Smith, Holmes, Ginn, Whitner, Doss & Gamble.
Pryor's situation aside, Cam Heyward is the only guy coming to mind as we start the next decade that is the caliber of the players on that list. Maybe I'm missing someone but it seems a very subjective case could be made for a decline in top end talent over the decade just from looking at this.
I think Simon can develop into a top-20 player (and obviously has two years to surge higher), but overall I agree with you, especially since centers like Mangold and Brewster aren't going to generate much interest in these lists.