To me these have to be the best QB's of all time, my all tiime favorites.  So here's the list...

Roger "the Dodger" Steauback:  Played for the Dallas Cowboys and was a superbowl mvp.  Well known for his dodging techniques,  barely anybody could tackle him much less touch him with all his evasive maneuvers.

Joe Montana:  Took the San Francisco 49ers to the superbowl and was mvp.

Troy Aikman:  An all star qb who also played for the Dallas Cowboys, an mvp qb. Currently a commentator for the NFL league and still popular.

Brett Favre:  Legend and still current qb for the Green Bay Packers, took them to the superbowl as well to become an mvp. 

John Elway:  Broncos all star and legendary qb, he took the Broncos to the superbow 3 times and won 2 out of 3 times, a two-peat, back to back, one of the only qb's ever to achieve that goal next to Johnny Unitis.

The Best QB in all NFL History:

Johnny Unitis:  Was the Baltimore Colts all star legendary QB that is arguably the best QB who ever lived.  Though many have played like Unitis, Unitis has never been compared to playing like any other QB ever.  Winning multiple superbowls and well known for coming on the field and firing up his teammates to play like football gods.  Forever in history will Johnny Unitis be the best QB whoever lived.