BYU has been a big-time college football program for the better part of 40 years. The large amount of very skilled players they have had is one of the main reasons for that success. Plenty of those great players have gone on to have very successful careers in the NFL.
Note: A list like this is completely subjective, but I try to leave all bias out when I do my rankings. Only what each player did in the NFL got taken into consideration.
All-pro selections, Pro Bowl selections, years as a starter, years in the league, stats and impact on the team were the factors used when doing these rankings.