John Lee Hooker, Greatest Blues Artist of All Time?

Hi, Im interested to see who people think is the best blues artist, ive recentley gotten into a lot of blues music over past 6 months or so, starting with Eric Clapton, John Mayall & Bluesbreakers, John Lee Hooker, BB King and more recentley Gary Moore. Now I know the 'real' blues fan will scoff at my choices a i know theres blind willie mctell and albert king etc etc loads of others that i havent got round to checking out yet but i think you will agree that this is definitely a good introduction to blues?