Maddipati Krishnarao brought this to my attention:50 Great Voices: Send Us Your Nominations.
For many Telugus, one of the voices will be that of Ghantasala. Many of his songs are available on the YouTube and oldtelugusongs.
Here is one of my favourites palukaradate chilaka ; the music director for the film was also Ghantasala. NTR reminds me of my father in the early 1940's. A short fillow up here; both seem to be missing in oldtelugusongs site.