Khari Demos joins Matt Waldman’s RSP site this season to profile college football’s trenches while keeping an eye on standout offensive skill players.  This week, Oregon State’s potential first-round tackle Taliese Fuaga, Oklahoma State’s LeVeon Bell-esque RB Ollie Gordon, and don’t sleep on Tulane QB Michael Pratt. Taliese Fuaga, RT #75, Oregon State The Tacoma,…