I love Ridley, but I am not sure he is a great value at 8.
I know we need WR help, but they are on of the riskier positions to draft high.
Also at Ridley's size and the system the Bears will be running he needs to run the 4.34 that you are projecting.
I think has excellent value at 8, but because so many will be hung up on the drop in his production while overlooking the real reasons from that drop, & I think the Bears could have their cake & eat it too, by trading back & picking Ridley.
This season Alabama ran a run heavy/run first offense that asked the WRs to block more than in previous seasons & I believe all off their WR's fell short of touted production. Ridley still turned in a solid season of production spite of the change in offensive philosophy. But when you look at Ridley in prior seasons when Alabamas offense thew the ball significantly more, Ridley has fantastic play & production to go with it.
IMO Ridley is one of the rare examples of a blue chip young talent that would be an excellent pick at #8 & an even better investment if he were aquired in a trade back over circumstances over his drop in 2017 production that have more to do with the change in Alabamas offensive philosophy than they do with Ridley as a talent.
I love his excellent route running, his ability to line up at all WR positions, his speed, blocking, & moist of all that he's a hand catcher with fantastic hands. IMO I think the Bears could trade back, still get a #8 or better talent, & get much need picks, & I don't often entertain the idea of trading back. Also if Simmie Cobbs Jr. is still on the board in the high mid rounds, I'd run to the podium to take him to if the Bears got extra picks for moving back for Ridley.