Right you are, uninvitedwriter... His "I Wish I Was In New Orleans" almost bring tears to my eyes every time I hear it. I am also a big fan of John Prine ("Hello In There" and "Sam Stone" are classics). Karen Carpenter had an amazing voice, as does Linda Ronstad, but one of my all-time favorite albums, chock full of great voices is Emmy Lou Harris' "Duets".
RooBee mentioned Janis Joplin who I listened to with new ears not that long ago. If she had lived, and they hadn't ruined her (which they did) she would have gone down as a major blues voice. She really had it.
I agree and i believe that only Janis the godes Joplin could sing everything ,specially she could sing with instruments or without.But you can look to the door next to you because sometimes you can find some masterpieces individual songs from none.
Queen of Rock Stevie Nicks. I have a hub about her with pics and videos and everything. She was creative, and extremely cute.
I also liked Linda Rohnstadt for a great theater type voice.
Voices must sound better when connected to a pretty face, although that gal in London has a voice like silk. And she is pretty plain jane. When someone has a voice like from God it can be connected to anybody and will be front and center.
Males: Paul Rodgers, lead singer of Bad Company and now Queen (and the late, great Freddy Mercury of Queen), Eddie Vedder of Pearl Jam, Gavin Rossdale of Bush, and definitely Roy Orbison. And Chris Isaak.
Females: kd laing (love her duets with Tony Bennett), Sarah McLachlan, Joan Baez, Fiona Apple, Joan Armatrading. Also agree with London Girl on Nina Simone!