#2 Harper
Another member of the Wyatt Family, Harper has been loyal to Vince McMahon's 'B' show and has never left the show ever since joining the roster in 2016. Luke Harper's latest status as a WWE Superstar has been very controversial. He had asked for his release last month but WWE declined it.
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Nevertheless, he continues to be a part of SmackDown Live in 2019.
#1 Carmella
The former SmackDown Women's Champion, Carmella had made her main roster debut on the first SmackDown episode after the brand split. She has been one of the most successful female superstars of the blue brand. Carmella has often been paired with male superstars on WWE TV.
But still, she has managed to win the Money In The Bank briefcase twice, the SmackDown Women's Championship, the second season of WWE Mixed Match Challenge and also the WrestleMania 35 Women's Battle Royal.
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These achievements have made Carmella one of the biggest assets of SmackDown Live.