Noipoi
Howdy!
No shades MonkeyThat's the thing, there's a whole lotta candidates when it come to RH representation. Us not agreeing on a single one is likely the main reason you don't see any of em super high in fan polls. Heck, even I'm not quite sure. I personally narrowed it down to 4.
Karate Joe has the honor of having a variation of his rhythm game "Karate Man" in every single game since the original. Tbh, his only real downside is that he'd focus too much on punching and kicking, while in my eyes, a true RH rep should focus having a whole lotta characters and items in a G&W/Pac-Man style manner. That being said, he's pretty much one of the series mascots, so I think he's at least worth mentioning
Tibby is a very new face, having only debuted in the most recent game in the series Rhythm Heaven Megamix. In that game, he's treated as the main character as the whole game kinda has flowing narrative. Due to him being a blank slate of sorts, he could easily have a whole lotta items and characters from the series in his moveset without feeling out of place
The Wrestler and/or Reporter. They're oneoffs, but they've got some notoriety given their memetic status as their rhythm game, "Ringside", became the subject of a hundred internet parodies back in the day and thus, it's one of the most wellknown among them.
Tap Trial Girl. She's one of the series' many "rhythm girls" of sorts. Her minigame "Tap Trial" is reoccurring, having appeared in 3 out of the 4 main series games. That, and like Tibby (Heck, maybe even moreso than Tibby), she's a blank slate so you can easily give her elements from throughout the series without it feeling odd.
If I had to pick one out of all these... uh... Reporter and Wrestler
I'd be perfectly fine with any others tho, like Chorus Kids, the Barista, and so on
Smh tbh