While you didn't mention in your original post that the sounds needed to be African, one
One album comes to mind: Despite the fact that I hate the Grateful Dead, Mickey Hart did a project called The Rhythm Devils that released an album called "The Apocalypse Now Sessions." Guess what film it was used for? :-)
It's entirely drums and voices. Dark, mysterious, heavy at times. Very evocative and highly recommended. Might provide some ideas! Recorded close to where I live! :-)
The Garinagu of Belize are a New World example of direct African influence in terms of their folk music, also all drums and voices: An example can be heard here on my blog.