OK, so here's my spin...
ALL of the old guys especially Robert Johnson - the man's music gives me chills
Junior Kimbrough, SRV, Clappers, Buddy Guy, Led Zep, The Who, The Stones... this could go on forever!
The Black Keys - Attack and Release is their best yet. Good live - they come to Oz regularly
Johnny Lang can rip out some soul destroying Blues - the clip on the Crossroads DVD is awesome
John Mayer - (at times, but not too much in one sitting)
The Living End - (Not strictly Blues, Maybe Punk Blues Rock?? but they have the best live act I've seen)
Seasick Steve is playing up a storm over here at present
John Butler - (Rootsy Blues)
Jeff Lang - (I'm not a lover of slide usually, but you're missing out if you don't catch him)
Ali Farka Toure' - from Timbuktu (no joke) genuine African blues - google him, you won't regret it
I could go on...