This is a really interesting thread, it's fascinating seeing everyone's choices and tastes, plus it reminds me of singers i had forgotten about!

Some of my favourites are:

Mick Ryan
Norma Waterson
Joan Osborne
John Denver
Ron Taylor
Mary Anne Haynes
Queen Caroline Hughes
May Bradley
Jose Gonzales
Will Noble
Apmaro Sanchez
Julie Murphy
Eleanor McEvoy
Charlie Wills
Viv & Vic Legg
Ricky Nelson
Sid Kipper
Beyonce
Lal Waterson
Eliza Carthy
James Raynard
Mara Kiek
Dorothy Carter
Margaret Palmer
Dave Denford
Mary Humphries
Dave Fletcher
Mary Hampton
Keiron Means
Cyndi Lauper

I could go on!