I'll nominate the following:
Allman Brothers Band - Eat A Peach
A classic. This was released as a double album set and it's worth ever inch of vinyl. Ain't Wastin' Time, Les Brers, Melissa, Blue Sky, Little Martha--all classic, stand-the-test-of-time cuts. The Mountain Jam extends over 30+ minutes. Blues driving, slide playing electric guitar super goodness. Duane definitely knew his way around a fretboard.
Townes Van Zandt - Live at the Old Quarter
A great songwriter, but relatively unknown by most people. This is a great album for it's song selection, Townes stage banter and a great intimacy. Townes is a pretty good finger picker, but he's got a voice like Bob Dylan. You'll either hate it or tolerate it.
Jorma Kaukonen - Quah
An awesome album by Jorma. This album came out in 74, when he was known more for his Jefferson Airplane and Hot Tuna personas. A lot of the cuts from this album made it into Hot Tuna staples. Great acoustic, fingerstyle blues guitar work.
Hot Tuna - Burgers
The best Hot Tuna studio album (the best Hot Tuna album[s] are the Live at the Sweetwater discs [take note of Bob Weir singing Good Morning Little Schoolgirl on Live at the Sweetwater Disc 2--fantastical]). This disc is one of the few albums I own where every track is great. There's no skipping on this disc. Jorma rips off another psychedlic, bluegrass twinged acoustic number (similar to Embryonic Journey from Surrealistic Pillow) with the Water Song. Several songs are classic, Reverend Gary Davis blues numbers that Hot Tuna has become known for.