It's so hard to judge. Ohio's best players aren't always the ones NFL teams are interested in. Many players who excel in college aren't NFL material for different reasons (a lot of time size or speed). Often times, it's guys who are good but not great in college that are more interesting to the NFL because they have professional speed or strength.
http://www.cbssports.com/nfl/draft/prospectsearch?multise... Rankings on these subjects change a lot within a year, but Basham is the #33 DE and Laseak is #74 DE on this list for next year's class. Sayles is #95 DT. Mangen is #51 TE. Watson is #70 OT. Sprague is #96 QB. Brown is #107 OLB.
Poling is #28 ILB for next year. Morgan is #47 TE. Ouellette is #55 RB. Pruehs is #67 OG. Moore is #72 OLB. Nelson is #83 FS. There's a bunch of guys ranked 100 and below. Some aren't even with the team any more, so I think once you get to a certain point in the rankings, they probably aren't worth much. Obviously only 10-25 guys at a position get drafted.