#1 Jobber became champion: Daniel Bryan
The current WWE Champion Daniel Bryan is another wrestler who debuted as a jobber before becoming a main eventer. He lost (almost) every match during his initial days in WWE but then returned to the Independent Circuit, where he rebuilt himself.
Bryan returned to the WWE in 2010 and in some time, won the US Title. Keeping the title for the next 176 days, Bryan also provided many great matches. After dropping the title, he became the World Heavyweight Champion and his reign lasted more than 3 months.
Bryan career skyrocketed again when he started the YES! Movement in WWE. He became the biggest Superstar in the company and the fans wanted him to win the Royal Rumble 2014 match.
However, it didn’t happen and Batista won the match which produced riot among the fans. Then, WWE listened to the audience and then changed their ‘Mania plans and included Bryan in it as well. Even though an unfortunate injury forced him to retire in 2016 but last year Bryan made his in-ring return and currently is the WWE Champion.