You do know this years heisman trophy winner (Lamar Jackson) was 3*/4* according to every service and wasn't even in most sites top 300 prospects overall.
The 5* top ranked QBs of that class were Blake Barnett and Kyler Murray. Both guys have already had to transfer and barely played.
Recruiting rankings are not even close to being infallible. I'm pretty sure the best player from this class will ultimately be some 3 star nobody is talking about.
Just for your info here is Alabama roster for upcoming bowl game. This is according to 247 composite:
Offense
WR - ArDarius Stewart - 95 4 star
WR - Calvin Ridley - 99 5 star
LT - Cam Robinson - 99 5 star
LG - Ross Pierschbacher - 96 4 star
C - Bradley Bozeman - 87 3 star
RG - Korren Kirven - 92 4 star
RT Jonah Williams - 98 5 star
Defense (this is just plain scary)
DE - Jonathon Allen - 99 5 star
NG - Da'Ron Payne - 98 5 star
DE - Dalvin Tomlinson - 91 4 star
LB - Tim Williams - 96 4 star
LB - Ryan Anderson - 94 4 star
LB - Reuben Foster - 99 4 star
LB - Shaun Hamilton - 91 4 star
DB - Marlon Humphrey - 99 5 star
DB - Minkah Fitzpatrick - 98 5 star
DB - Ronnie Harrison - 91 4 star
DB - Tony Brown - 99 5 star
Nick Saban doesn't beat you on gameday. He wins in February. That lineup should beat anybody in the country.