I've seen King King several times and they are just about the best British blues band on the circuit at the moment. Guitarist/singer Alan Nimmo also plays with his brother Stevie as
The Nimmo Brothers and they are worth checking out too - as is Stevie's own band.
A few more not mentioned:
Mick Taylor
Coco Montoya
Popa Chubby
Jimbo Mathus
Son House
Charley Patten
T Bone Walker
Luther Allison
Bernard Allison
Julian Sas
Innes Sibun
Roy Mette
Guitar Shorty
Guy Davis
Jimmy Burns
Joanne Shaw Taylor
Chantel McGregor
Walter Trout
Ian Siegal
Larry Miller
Alan Nimmo
Buddy Guy
Aynsley Lister
Catfish keith
Kent Duchaine
Danny Bryant
Oli Brown
Elvin Bishop
Lonnie Mack
Johnny Winter
Michael Katon
Mark Selby