4. Joe Montana
Montana is the second-most successful quarterback in NFL history. Before Tom Brady came along he was unquestionably the greatest. However, the 49ers didn’t select him until relatively late in the draft. They used a third-round pick to bring ‘Joe Cool’ to the Golden State.

They reaped the rewards because his abilities were remarkable. Montana had a magnificent career with the 49ers before a short spell with the Chiefs. He won four Super Bowl rings with three MVP awards. It’s crazy but Montana was one of the biggest steals ever (via Sportskeeda).