Non biased opinion? As pure wide receivers I would rank them:
1. Jeudy
2. Smith
3. Thomas
But, we already have Richards as the #1 WR, so for Miami...the list changes from "Whose the best WR" to "Who can give us what we need".
I think we all can agree that right now our offense has a "Need for Speed". We also need a spark in the special teams (Hopefully Richt doesn't throw another Malcolm Lewis at Return Specialist). When you factor in the needs of the offense, and team as a whole, the list can be flipped.
Fastest, most dynamic player who can be a threat if he touches the ball would be:
1. Thomas
2. Smith
3. Jeudy
How you rank them solely depends on what you're asking.
Who would I rather have for this current Miami offense?
Thomas > Jeudy > Smith
Who would I rather have in this recruiting class?
Jeudy, because when it's all said and done, this trend of south florida WR's thinking that "all the best ones go to Bama" need to stop. Getting Jeudy (knowing how bad Saban wanted him) would have been huge for now and the long run IMO.