I don't see anyone that fits your WR requirements. Chase is supposedly the best WR in the draft, but he had the best QB in the NCAA passing him the ball.
Does anyone see a dominant, aka Aaron Donald type, presence in this draft?
RB1 - Okay, There are a couple obvious choices here. There's Etienne and Harris. Etienne benefits (or used to benefit) from the best QB in NCAA. Harris benefits from being a member of the team that gets the most talented players in college football. Personally, I'd give the edge to Harris, because he has never played with the best QB in the NCAA.