#2 Randy Orton

Randy Orton had a lacklustre run for major parts of 2017 and 2018. He was in serious need of character change to stay relevant in WWE although he remains as the last of full-timers in the company from the Ruthless Aggression era.
Orton took some time off and made a surprise return at the Extreme Rules 2018 where he turned heel in a devastating manner by attacking a vulnerable Jeff Hardy. He has continued to attack Jeff Hardy on multiple occasions, and he even tried to wipe out his identity.
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Orton's new character change has been made him interesting, and it is also going over with fans. A feud with one of the biggest babyfaces of the brands is definitely on the cards for Randy Orton.