#2 Kevin Owens and Charlotte Flair are the only current undefeated Superstars to compete in every Clash of Champions PPV
It's only existed for two years, but that's one whole year more than 'Great Balls of Fire' will grace our screens so I don't think it's too early to be talking about a Mr. and Ms. Clash of Champions.
Currently, the two front-runners for those titles would be Kevin Owens and Charlotte Flair who are the only two Superstars to have a perfect record at both Clash of Champions shows, (there are several Superstars who are unbeaten after one match, but we'll have to wait and see if they can match this feat)
Owens defeated Seth Rollins in the main event of 2016's PPV to retain the WWE Universal Title and then defeated Shinsuke Nakamura and Randy Orton, alongside Sami Zayn, to retain his job in the WWE.
Charlotte Flair bears the unique accolade of being the first and only person to defend the two brand specific main titles in her division (The RAW and SmackDown LIVE Women's Titles) at consecutive Clash of Champions, beating Sasha Banks and Bayley in a Triple Threat and Natalya in a Lumberjack match.