(Darnit, hit the wrong button and lost my whole considered reply.)
Summary: Desantis is far behind the lead, but everyone else seems to be even further behind him. If Florida Man #1 fell out of the race/developed a limp, Florida Man #2 has the chance. Both would need to fall for anyone else to get that chance. Or develop a surprise groundswell of support that it's hard to see coming.
Haley seems to work best, in this regard, from what I know. Not sure how much "best contender" or how much "best if she won in 2024" I mean, in that mix, but perhaps there's some key points of sanity there. I've never (otherwise) heard of Eldar, though no doubt everyone in the US was at least aware of his TV show; I think that if he hasn't got a good background rumbling going on (not heard of, from this side of the Pond) then this actually counts for little. Ramaswaky seems to untick all the boxes, AFAIK, I doubt he can get R support and (if he did) he's not likely to get non-R 'floating voters' and fickle-Ds to give him the big prize at the end of it. Hutchinson at least ticks a lot of the perrenially desired R-credentials, from his past positions. The other five currently in the frame seem to be nowhere near, also.
On the other side of the aisle, Biden (so long as there's no good reason to back down) seems to be the better choice by clear default. Ok, so maybe it'd be interesting to see another Kennedy standing there (or 'interesting'), but I'd put shorter odds on Harris finding herself the defending incumbant than on anyone (including Harris, should she stop being the tagalong ticket by more normal means) becoming the challenging national candidate.
Not that I have my ear that close to the ground[1], so perhaps I'm just not awake to all the possibilities and undercurrents. You'd have no reason to believe I know anything and, based on past prognostications, you'd probably be right not to...
[1] Not since I got run over by that stagecoach!