I'm not bitter. Its great that she is making money and getting this social media attention.
As far as I know there are no sub-elite (or barely elite) level track athletes who are rocking social media like Dunne. She might be the second most famous gymnast in the US! Yet many elite gymnasts and people who are die hard fans of elite level gymnastics don't even know who she is.
The post asked if there is anyone comparable. And there is no onee. Can you think of any other sport where the second most famous athlete isn't even known by many of the die hard fans of the sport? I just don't think you can.
Good on her for her social media work. Nick Symmons is probably the closest to her on the social media front in distance running. He's far less accompished in social media than Dunne, but more accomplished in his sport. But he's probably the only social media runner who is more famous through social than his athletic accomplishments. So if you had to name a person, I'd name him, but he is far off.