The artists I listen to most consistently are:
Miles Davis
Thelonious Monk
Sarah Vaughn
Keith Jarrett
Nina Simone
Charles Mingus
Etta James
Michael Franks
Betty Carter
Georgie Fame
MeShell NdegeOcello
Beck
Fiona Apple
Donald Fagen / Steely Dan
Laura Nyro
Prince
Feist
Rufus Wainwright
Tori Amos
U2
Teena Marie
James Brown
Earth, Wind & Fire
Angie Stone
Jamiroquai
Lisa Stansfield
Simply Red
Dinah Washington
Stevie Wonder
INXS
Bob Marley
Ziggy Marley
UB40