#3 Bobby Roode

When Bobby Roode debuted on SmackDown Live he was treated like a star. He defeated Aiden English in his debut and completely crushed Mike Kanellis on the following week. He defeated Dolph Ziggler multiple times in his first ever feud on the main roster.
He then was a part of the main event of Survivor Series 2016 when he competed on Team SmackDown Live against Team Raw. While he was the second man eliminated, at the very least he was eliminated by the monstrous Braun Strowman.
He then won the United States Championship shortly after that by defeating the likes of Baron Corbin, Mojo Rawley, and Jinder Mahal. After he lost the US title, he was traded to Monday Night Raw. He was defeated by Elias on his Monday Night Raw debut. While he did qualify for the men's Money in the Bank ladder match, he was basically the punching bag of the Raw side of that match.
Both Braun Strowman & Kevin Owens defeated him. Bobby Roode has not made a match on pay per view since then. If he turns heel on current tag team partner Chad Gable he has the potential to be a star.
Becky Lynch has been challenged HERE.