It's a handful of guys running 4.55 and slower. Most guys are sub 4.5 now.
I have an entire thread on WRs attributes from a few years ago. I don't have the time to put all the stats in there for the past couple years, but I might.
He has the height, weight, RBS and hand size for sure. I haven't seen his Vertical, Broad, 3-cone or 20-yard shuttle.
His speed even at 4.57 is still okay for a bigger guy.
I was mainly keying in on your statement about there being a lot of guys in that range, but it's not the top guys. The top guys are faster than that and the handful you posted is just that, a handful of guys with 2 not even active anymore and a few more in the twilight of their career.
The younger generation is faster except Puka who is a tactician.