Yeah if you're looking for Jpeners to watch for inspiration or teaching, you won't really get it on the pro circuit.
Thankfully, you don't need to only learn form a top pro. There are players out there who play a variety of styles who are still very, very good and I would imagine would wipe the board with 95% of the players on this BB.
I'm left handed and while I play with CPen, I mainly use TPB so I like following Moriya Tsubasa. He's very good.
https://www.youtube.com/channel/UCGyyo2eN5jr-Uwu4MJ-C4MA
Also PD has a good channel. He posts a lot of his training sessions with his coach of which you can pick up tips. He also translated several training clips from a clinic he went to featuring RSM. It's also a good channel.
https://www.youtube.com/channel/UCIQJdX7czzLhYGxj-VSZOBg
Also it just hit me that I'm pretty sure Qui Dang plays with a Jpen. But he has inverted on the front & back side so he does RPB. It a traditional player. But it is Jpen.