Looking for Blues with High Fidelity

Hans Theessink, Robben Ford, and Robert Cray as mentioned above. I also find Tedeschi Trucks Band albums very well recorded (and great playing). Keb Mo’s albums are also some of the better blues recordings out there.

"Come On Home" by Boz Scaggs is more bluesy R&B than Blues but it's a terrific sounding disc and the playing/singing is excellent. 

I have most of Doug MacLeod’s work.
It seems to be generally very well recorded.

This may be of interest. It looks like these remaster are to be released this month.

Joe Bonamosa - An Acoustic Evening at the Vienna Opera House

David Johansen and the Harry Smiths

Mississippi Fred McDowel - I Do Not Sing No Rock and Roll

Otis Spann - Good Morning Mr Blues