Exotic vocal

Kathleen Ferrier (1912-1953), most notably as far as I am concerned in her 1947 recording of Brahms' Alto Rhapsody.

As someone said in a comment to the video:

This has to be one of the most beautiful and moving pieces in all of Western music.

Regards,
-- Al
 

The undisputed queen of the exotica genre is Yma Sumac from the 1950's when the genre was at it's apex. She was Peruvian-American and was famous for her extreme vocal range said to be well over 5 octaves. Check her out here hitting 4 1/2 octaves and singing in "double voice".

Oh boy, that I would call exotic. It feels like you are in the middle of Amazonian rainforest. Incredible range.

Yma's records are collectible and rare. Near-impossible to get in great shape.

Yma is certainly impressive. Another very unique sounding singer I would include here is Ethiopian-American Aster Aweke. Check her out on Y'Shebellu (Name of a River).