The years before and after the turn of the millenium were a golden era for mellow songs by African male voices. Two songs each by seven singers - Richard Bona, Wasis Diop, Henri Dikongué, Lokua Kanza, Ismaël Lô, Vusi Mahlasela, and Samite. (playlist in Comments)
photo - African fabric by Rayela Art https://www.flickr.com/photos/rayela/48382685522/