Looking for Blues with High Fidelity

+1 Muddy Waters Folk Singer (Mo-Fi Master)

+1 John Lee Hooker the Healer (Mo-Fi Master)

Buddy Guy Sweet Tea (CD)

Bloomfield, Kooper, Stills  Super Session (CD)

Holly Cole Temptation (Tom Waits songs) jazz-blues CD)

The cd's have very good sound too.

+1 for Lucky Peterson😎

That's a tremendous list of recommendations, with numerous +1s from me that's too long to list

A couple of my off the beaten path faves that hit the mark on SQ

Ronnie Earl Still River released on Audioquest

Lightin Hopkins by Lightin Hopkins released on Folksway in 1959

ZZ Top One Foot In The Blues

The SQ of the playback of the first two Dire Straits albums are very well done

The Black Keys do a great tribute to Junior Kimbro on a disk named Chulahoma

And while more southern rock, you can't go wrong with any of the live Allman Brothers material as most of it is dripping with blues influences

A couple of notable go to cuts from the Allmans that I use for reference when testing new gear are 

Hard Times on Hitting The Note

Instrumental Illness on Hitting The Note

An acoustic version of In Memory Of Elizabeth Reed on A Night With The Allman Brothers 2nd Set

Someone who likely has never been mentioned on Audiogon before, the late Jump Blues pianist/singer; H Bomb Ferguson. Unfortunately, his records can;t live up to his live performances.

Mighty Sam McClain  Keep on Movin'  I use this as a test CD.  Dynamics and soundstage are tops regardless of genre.