stevie Wonder surely?
vashti Bunyan
Sandy Denny
Cat Power
Robert Smith (very distinctive)
Michael Karoli (probably a bit controversial, but i really like his delivery)
Richard Butler
Jimmy Scott
Seal (well he has a lovely voice and i quite liked Trevor Horn's production on the first couple of albums by the by. There's an apologia for you cos i know that Seal probably doesn't carry much kudos around these parts!)
Bill Calahan
Neil Young
Mark Lanegan
Johnny Guitar Watson
Jamie Lidell