#1 Rebuilt himself - Dolph Ziggler
Remember the day when Dolph once put his career on the line to get a shot at Miz's IC title or the episode of SmackDown Live where the new United States Champion Dolph Ziggler left his title in the middle of the ring saying he was leaving WWE. Right now, we cannot imagine the same guy even thinking of leaving the company with the way he has rebuilt his character on RAW.
Ziggler is one of the top heels on the red brand and even features in the main events of the "A" show quite frequently. WWE Creative have worked a lot in helping Dolph get relevant again. On the blue brand, he had been reduced to the role of a veteran who was used to put over the upcoming NXT superstars but ever since the Superstar Shake-up of 2018, Ziggler has been unstoppable. The ShowOff has won 2 different titles (the Intercontinental title and the RAW tag team championships) in 2018, a thing which he had never achieved in his 2 years on SD Live.