I realize this is a folk/blues site, but I have arranged several Oscar Brown songs for acoustic guitar and voice. Among them: Signifying Monkey, The Snake, Rags and Old Iron, and Somebody Buy Me a Drink. These songs always get a strong response from the audience. Although OBJ is usually classified under Jazz Vocalists, many of his songs come from the chants and chances of the urban black experience and translate into great folk/blues. If anyone has any other arrangements or chord progressions for other of his songs, I would appreciate hearing from you.
If you haven't heard OBJ before, it is worth checking him out - mostly on Columbia (circa 1960-65). Some reissue on CD is available.