We are obviously a long way out and some of what I am predicting is a bit of shit talking...BUT:
If I had to put some money down on 2024, I would on Ronnie D. I think he articulates his rhetoric quite well and stays off of social media to lure moderate voters who went against Trump in 2020. And he's not part of the shit-tier Capitol gang like Cruz, Little Marco, et al. who have more than worn out their welcome among voters and really have no business running ever again. I suppose another name is Tom Cotton, but I'm not sure he's as likable as Ronnie.
The wrench into all of this, naturally, will be iF Biden DOESN'T run in 2024 and we get PC'D over the head with "VOTE FOR KAMALA, YOU MISOGYNIST DONKEYS," which I honestly can't wait for...