FYI, Guest Gwen and several other folks who live in South Africa have been discussing various recording artists in this Mudcat thread: Music of South Africa thread.

Among the artists that are noted in this thread are:

Sibongile Khumalo who "combines jazz with traditional African music, and also performs a lot of classical [music]"

Abdullah Ibrahim

Joe Nina

Hugh Maskela

Lucky Dube

Arthur Mafokate (solid hip-hop)

Freshlyground, Nthando (Afro-pop)

Zola, Judith Sephuma (gospel)

Zamajobe (Afro-pop/soul)

Skwatta Kamp, Kabelo (kwaito - hard-core township-based pop

In addition, Guest Gwen highly recommends the soundtrack to the movie "Amandla: A Revolution in Four-Part Harmony" which "tells the story of the role music played in the SA liberation struggle. On this soundtrack, you will find Sibongile Khumalo performing one of the anthems of that struggle - it is called "The Untold Story" - and she is accompanied only by a pianist. It will give you some idea of her power."

-snip-

I found various online references to Sibongile Khumalo. Here is one link to information about this South African artist:

http://www.music.org.za/artist.asp?id=99