Just a quick '2min Drill' video on O'Cyrus Torrence.
https://www.youtube.com/watch?v=buCxVM505HE

As the clip says, Torrence is probably the first OG off the board. I have seen him on various big boards as high as 26 all the way down to around 60. Obviously his draft value will depend on team needs but he is considered by everyone as top OG prospect in this draft.