Elis Regina is not someone I have ever heard of, probably due to the fact she is Brazilian and died at the age of 36 of cocaine, alcohol, and temazepam interaction. I think the main reason I have not heard of her is she was Brazilian and her album Vento De Maio was released in 1978. This album is not on Spotify. I had to find each song on YouTube.
I do not like Brazilian music. Her voice is not terrible, but it did not move me at all. I did not hate it, but I would never listen to it again. 5/10.