Beyond Mariota and Leonard Williams, I'm not confident about much in terms of where people are likely to go. I do wonder if BB would be tempted to trade up if Fowler fell into the twenties. We might not need another Ninkovich now, but we might in a couple of years. I do agree with your reservations though.
It's way too early, and mocks mean little, but most mocks that I see have Fowler going around 15-20 or so. There was one I saw that had him in the 3rd round, but that was an outlier. Walter Football's latest mock has Brandon Scherff going at 15 and Fowler at 16. Incidentally, they had your guy Odighizuwa going at #42 overall.
Like you, I'm not worrying much at this stage about where people will go. Fowler's certainly on my "short list" of potential 1st round targets.
My "short list" right now looks something VERY roughly like this:
Brandon Scherff, OL, Iowa
Leonard Williams, DL, USC
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Shawn Oakman, DL, Baylor
Dante Fowler, DE/OLB, Florida
Bernardrick McKinney, LB, Mississippi St.
Cameron Erving, OL, Florida St.
La'el Collins, OL, LSU
Ereck Flowers, OL, Miami
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Spencer Drango, OL, Baylor
Arik Armstead, DL, Oregon
Shaq Thompson, LB/S. Washington
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Carl Davis, DL, Iowa
Josue Matias, OL, Florida St.
Arie Koundjio, OL, Alabama
Laken Tomlinson, OL, Duke
AJ Cann, OL, South Carolina
Cody Prewitt, S, Mississippi
Danny Shelton, DT, Washington
Jordan Phillips, DT, Oklahoma
Ellis McCarthy, DT, UCLA
Owagabme Odizhiguwa, DL, UCLA
Eric Kendricks, LB, UCLA
Eric Striker, LB/S, Oklahoma
-----------------------
Ameer Abdullah, RB, Nebraska
Karlos Williams, RB, Florida St.
Jay Ajayi, RB, Boise St.
Kevin White, WR, West Virginia
Ty Montgomery, WR, Stanford
Shilique Calhoun, DE/OLB. Michigan St.
Obum Gwachum, DE/OLB, Oregon St.
Bud Dupree, DE/OLB, Kentucky
Bronson Kaufusi, DE/OLB, Brigham Young
Henry Anderson, DL
Durrell Eskridge, S, Syracuse
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Wild Card: Dorial Green-Beckham, WR, Oklahoma