Clemson's Mike Williams, a top WR prospect who intends to enter the 2017 NFL Draft. His coach, Dabo Swinney, says he's a more complete prospect than ex-CU WRs DeAndre Hopkins and Sammy Watkins.
http://www.nfl.com/news/story/0ap3000000748406/article/dare-to-compare-nfl-comp-for-clemson-wr-mike-williams
If the Bills got Williams he would become the prototype #1 WCO WR while Sammy would be moved around more and used to create mismatches.