#2 WWE and IMPACT star Franky Monet/Taya Valkyrie
I don't blame people who don't follow wrestling outside of WWE for not knowing that the recently debuted Franky Monet was one of the biggest female free agents prior to signing for WWE. But anyone else should be fully aware of what Taya Valkrie has accomplished.
Not only is she the longest-reigning Reina De Reinas Champion for Mexican promotion Lucha Libre AAA Worldwide, holding their female world championship belt for a whopping 945 days, but she's also the current record-holder for longest-reigning IMPACT Wrestling Knockouts Champion.
Valkyrie won the title on January 6th, 2019 and only lost it over a year later to Jordynne Grace on January 18th, 2020. This makes her reign 377 days long, with the next closest Knockout being Taryn Terrell's 279-day reign back in 2014.
She may be playing a completely different character to the one we're used to seeing her play in WWE, as the small dog-holding Franky Monet. But I'm sure it won't be long until her championship pedigree shines through and she reminds people she's a formidable champion.