I like Shelton, and if Fangio can fix his pad level issues then we would have a star on the DL. We have all looked over every player at the top of this draft enough times to have our favorites, so it is no surprise that the board is divided over this guy. However, I think one major point is being forgotten, which would change how we view Shelton's value to this team: Shelton would immediately provide us an avenue through which our more versatile defensive lineman, Jeremiah Ratliff, to be an effective weapon on our line.
One of Fangio's most effective lineups in san fran was a 3-4 under, 1-gap alignment. His NT doesnt line up at the 0tech in that alignment, he shifts to the 1. His DEs are in the 3tech on the left, and 5tech on the right. Finally, he has an OLB playing outside the LT in a wide-9. Shelton would be gap-shooting from the 1, Ratliff would shift to 3tech, and in my mind Ferguson would be the no-frills 5-tech. Fox also likes to throw in 4-3 looks at times, and Shelton would stay on the field for those plays as well (he is fairly scheme-versatile)
That is only one formation, and I expect Shelton would get more playing time than Ratliff as the season wears on and he adjusts to the NFL. Shelton is very coachable, and a great prospect. Is he the best DL in the draft? No, Leonard Williams is, but he will be off the board. There are other defensive prospects that I'd choose over Shelton, Fowler and Beasley - but they should both be picked up as well. But I still view Shelton as a top-10 draft pick, and he would be an immediate contributor to this defense.
Regardless of who we take, I expect Fangio and Fox know how to get the most out of the player. Shelton may be a 2-down player in the beginning for us, but I am confident that he would grow into a monster in the middle for us. We could really use a monster in the middle.