This is off the cuff but Blues is a very wide genre. Many good artists are often regional. Many also are more popular in Europe Like Luther Allison, et al. And their music is not as easily found. But they are very rewarding. These are albums I have and can recommend
Layla Zoe - Breaking Free
Keb Mo - Slow Down & Just Like You
Keb Mo & Taj Mahal - TajMo(?)
Collins, Cray * Copeland - Showdown
James Cotton - Live From Chicago Mr Superharp Himself
Big Twist - Live from Chicago
Jimmy Smith - Dot Com Blues
Toronzo Cannon - Pain Around Me & Politician Preacher or Pimp
Albert King - Cold Snap
Some names of interest
Shemeka Copeland
Joe Bonamassa & Beth Hart
Gary Moore
Samantha Fish
Charlie Musselwhite
Tommy Castro
Roomful Of Blues