At 27, JSN excites me the most and Johnston scares me the most. Addison is perhaps the best route runner and most pro-ready. Flowers is explosive and is built like a tank, playing above his size. Feel similarly about Hyatt as Johnston: both strike me as slightly built, even if they have height and speed, and fairly limited in route tree.
After 27, I like Dell and Mingo. Would be fine with Downs, but not super excited. Rice scares me, too. Boutte might be a name to watch with the LSU WR coach connection, but meh on him.