There's no accounting for taste.
Surely that's true in terms of musical preferences. It may be less true when it comes to sonic quality, but the divergence of opinion on this among even fairly well informed audiophiles suggests that this familiar saying should be given considerable weight even as to sonic merits.
With those caveats in mind, I will tell you that while I currently have some 135 radio stations labeled as favorites within the Lumin App and Roon, in terms of internet radio listening through my primary audio system, the two stations which get by far the lion's share of air time are KCSM (jazz from the San Francisco Bay area) and WFMT (classical from Chicago, my home area). Another favorite is SomaFM's Sonic Universe stream. I also enjoy the Australian Broadcasting Company (ABC) classical and jazz stations, as well as Canberra Australia's ArtSound FM 92.7. Others include WILL-FM, the FIP (France) streams, Jazz 88.5 from Minneapolis, the Radio Swiss Classic and Jazz streams, Canal Jazz and Sun Jazz from France, several Minnesota Public Radio streams, and other SomaFM streams. Heck, I listen to many of my 135 favorites more than occasionally.
You will note that none of the ones I mentioned are on the FLAC list. For internet radio streaming I generally listen primarily for musical content, not for sonic quality. When i go beyond my top two favorites, I often engage in channel surfing until I find something that is especially engaging musically and/or sonically and park there for a while.
Of the channels on the FLAC list, so far in my explorations, in terms of sonics I would rate the Czech D-dur classical and Czech Jazz, Mother Earth Radio, as well as the three Naim stations at the top of the heap. Much of the musical content of the 40+ stations on the FLAC list is not really my cup of tea, but the ones I mentioned are both musically interesting to me and sonically superior, primarily because they have less obvious signal compression or other processing.
Assuming you want to find new internet radio stations of interest to you, what's a good way to go about that? To get started, I suggest going to the
vTuner Internet Radio station list page. Then pick a musical genre, such as Classical or Jazz. Within your chosen musical genre, choose to sort the stations either by Fastest Speed (giving sonics priority) or by Most Popular (giving musical content priority). If you regard yourself as a contrarian in terms of musical taste, you could always start at the bottom of the Most Popular list and work up. Take a listen by tapping the Play button beside any given channel. Once you find a station you'd like to make a favorite, you'll know what to do.