need some suggestions for Acoustics Blues

What are your favorite artists/recodings for acoustic Blues besides Muddy Waters MSFL "Folk Singer" and Buddy Guy "Alone and acoustics" (got them already)? Dont you just love the sound of acoustic guitar, harmonica, and vocal sound of the human soul/spirit? Any suggestion is appreciated...
Early Tuna features harmonica, fiddle, and great bluesy guitar work. Live at Sweetwater I & II are very good sounding for digital.

I second the vote for Eric Bibb. All three albums on hybrid SACD/CD on the Opus3 label are great and each of his several others on regular CD (that I have listened to) are good as well. Great music which is fabulously recorded to boot. Start with the Opus3 discs - I recommend " Just Like Love" as a starting place.
Mississippi Fred McDowell - Mississippi Delta Blues
Blind Lemon Jefferson - King of the Country Blues
Big Bill Broonzy - BBB Sings Folk Songs
Brownie McGhee and Sonny Terry - BM and ST Sing
Elizabeth Cotten - Freight Train and Other NC Folk Songs
Mississippi John Hurt - Today

Son House - Death Letter

Joseph Spence - Music of the Bahamas (phenomenal guitar playing!)

Reverend Gary Davis - Ragtime, Sun is Going Down, Pure Religion, Guitar and Banjo

Robert Johnson - King of the Delta Blues

John Hammond - Country Blues

Cephas and Wiggins - Dog Days of August

Rory BLock - Rhinestones & Steel Strings

Eric Bibb - Spirit

R.L. Burnside - Acoustic Stories

Kelly Joe Phelps - Shine Eyed Mister Zen

Guy Davis - You don't know my Mind

And 3 that few have heard of:

Jackson Delta - Lookin' Back (this is a superb album)

Bill Bourne - No Special Rider

Jimmie Lee Robinson - ... all my life
Doc Watson, "Trouble in Mind" his new country blues anthology. Plain and simply "Doc" is one of the great pickers of all time with a great singing voice to boot. You really can't go wrong with virtually anything "Doc" has put out.