So by definition wouldn't the most popular music be the best music? Does an artist have to have a hit to be the best? (I don't actually agree with that but as an argument it does have merit)
There is a lot of really good music being made today both in the USA and elsewhere. Whether it's a hit or not is mostly due to marketing, lack of music education and intent (dance music is very popular within certain age groups)
Over 25 years ago FM radio was the way to be informed of what was going on in the music scene. Today it's more of an active endeavor or can be outsourced to a program like Roon that uses a computer program and crowd sourcing to build your playlist. The good news is that due to streaming we aren't limited by geographic boundaries or radio program managers, the only real constraint is time.
While it will never be mainstream I really enjoy Stages: Volume III by
Ryan Montbleau. It is such an excellent recording capturing the space of the venue with music that makes me smile. Trust me to his dismay I'm sure it will never be a hit but that doesn't diminish it's enjoyment level to me.