No doubt that the above are among the greats. This article (knowingly or unknowingly) missed some of the greatest of legends in Indian clasical music. To name a few from the field I know a bit (Carnatic).
1. MS.Subbulakshmi- the great legend. 2. Valayappatti Subramanian- percussionist 3. Jesudass, 4. Kunnakkudi Vaidhyanathan 5. Lalgudi Jayaraman 6. L.subramanian, 7. Rajarathnam Pillai of Tiruvaroor 8. Chembai Vaidhyanatha Bhagavathar. 9. Semmangudi Srivivasan 10 And many more ................
As the great Thyagaraja sang "Endharo Mahanubhavulu..." (Means-Innumerable greats lived in this country")
I am sure that we have much bigger list from other regional/national forms of music. Somehow, it seems that the author feels only hindustani music is "Indian music". Some people deliberately create controversies to come to lime light-the author also seems one among them.