What lesser known music artists do you recommend based on my list of favorites?

Beck
Wilco
St. Vincent
Vampire Weekend
The White Stripes
Arctic Monkeys
Arcade Fire
The Roots
Mos Def
OutKast
Tori Amos
Kate Bush
Bjork
Jeff Buckley
Megadeth
The Beatles
Talking Heads
The Clash
Elvis Costello
Tom Waits
Donovan
Harry Nilsson
Joni Mitchell
Dolly Parton
Randy Newman
Gram Parsons
Roy Orbison
Otis Redding
Howlin’ Wolf
Sarah Vaughan
Buddy Holly
Miles Davis
Count Basie
Louis Prima