A few college bats have helium right now. Familiarize yourself with Kameron Misner, Josh Jung, and Bryson Stott first and foremost. JJ Bleday's stock is up too. I feel he's less likely to be in the top 5 mix though.
As far as Stinson goes, his stock is actually pretty down. The big question with him was going to be how he transitions into a full time starter. The numbers aren't awful, but he's been sitting in the high 80's with the fastball which isn't a good sign. Nick Lodolo might be the best pitcher to keep an eye on. He was lights out last week. If he keeps it up he will be the first college pitcher off the board.
Edit: This FanGraphs post is pretty informative.
https://blogs.fangraphs.com/instagraphs/another-draft-rankings-update/