Agreed, way too many great examples of influential drummers (really all musicians) who most people have never heard of. Tony Williams for example. Talent and success far too often share zero connection.
Great musicians who should have been famous except....
I'm throwing this out there as an example. My 16 yr old aspiring drummer son asked me if I had anything in the vinyl collection tonight... apparently the U Tube video tutorials finally got boring. He is really good and practices non stop but it was refreshing when he asked about ideas for sound. In a moment of 30 years past clarity I put on the B side of Van Halen 1984… Is Alex Van Halen the most under rated rock drummer of all time? And is there a better lead in to ANY rock vinyl side than that???