The other name I'd throw in here would be Chris Thomas King, who seems to have succeeded in fusing hiphop and blues, which since it seems to me that the "talking blues" was one precursor of hiphop, doesn't seem too much of a stretch in any case.
Robert Randolph is another candidate, though he tends towards the JamBand Blues chapter... In fact Jam Bands in general could be considered a Blues offspring, since ultimately it's Blues with a Jazz vibe - Dave Matthews is the name that sits on the top of that pile...
I definitely have a hard time listening to "Pure Blues" these days, it seems such a limited form, despite the possibility for virtuosity, so I guess I'm with Charlie and Howard...
However, I think one of my next projects in the light of all this discussion will be to revisit my Robert Johnson albums and see where I end up next...

