Speaking of alto sax players and obscure/unrecognized musicians such as J R Moterose, I think you can put alto sax player John Handy in both of those categories.
I really enjoy a lot of Handy's albums as a leader, and his playing on various Charles Mingus session dates.
One of his albums, Live at Monterey Jazz Festival, is on my desert island list. The release with the 3rd bonus track Ole Miss (Anatomy of a Riot) Live at the Village Gate is the one to get.
The two songs from Monterey
(1) John Handy - Monterey Jazz Fest (Full Album) - YouTube
Bonus track at Village Gate
(1) John Handy Tears Of Ole Miss Live At Monterey Jazz Festival - YouTube
And a nice blues track featuring Handy (not to bad) on vocals
(1) Blues For Louis Jordan - YouTube
And Handy expanding his horizons with Asian Continent musicians @mahgister may enjoy this album which features Handy on the alto sax combined with 2 eastern musicians playing the string instruments Sarod and Tanpura with a 3rd playing the percussive instrument Tabla.
(1) John Handy, Ali Akbar Khan - Karuna Supreme (full album) - YouTube