I was just thinking about the success of FN actually creating "stars" so I went thru the Wikipedia entry that broke down the 14 seasons with the last one being in 2018 (although I thought it was longer since it had aired!) IMO, this first list includes that have indeed become FN STARS, regardless of what their personal shows did viewership-wise (whether on their own show, part of an ensemble - a la The Kitchen, or because of their presence on the network as a judge or other type of panelist).
Guy Fieri
Aarti Sequeira
Jeff Mauro
Justin Warner
Damaris Phillips
Eddie Jackson
Christian Petroni
This shorter list are those chefs that partook, didn't win, but seem to have managed some sort of recognizabilty ofn TV, although much less "famous".
Kelsey Nixon
Melissa d'Arabian (left the country with husband shortly after her win, which likely affected her)
Jamika Passoa
Nikki Dinki
Tregaye Frasier
I'm sure not everyone agrees with my placements, but I was more curious what you thought of the track record? 14 seasons, with SEVEN bonafide stars. 50%. Certainly better success than any of the Bachelor shows! I suppose it might be interesting to see how many of the Top Chefs have found "personality success" too - but that's not the purpose of their show, or the contestants. I can think of a half dozen contestants from that (winner or otherwise) that have also become tv famous.