If you could only own 7 Jazz/blues albums. What would they be?

Miles Davis--Kind of Blue
John Coltrane--Giant Steps
Jim Hall Trio--Live
Taj Mahal--The Natural Blues
Django Reinhardt/Stephane Grappelli--any good collection
Muddy Waters--Chess Box Set
Robert Johnson--complete recordings

Tough one, maybe I'll go with.....

Danny Gatton & Buddy Emmons.  Red Neck Jazz Explosion
Grant Green.  Solid
John Mayall.  A Hard Road
Duke Ellington.  Far East Suite
Coleman Hawkins. Body and Soul
Sonny Rollins  Saxophone Collossus
James Booker.  Lost Paramount Tapes

This isn't a list of the seven best jazz and blues records in my collection.  It's an attempt to answer your question.  I'd want a nice mix of jazz and blues, guitar, piano, and sax, up tempo and slow, melodic and challenging, etc.  This could do the trick.

All first pressings: Jazz
Mile Davis - Kind of Blue
John Coltrane - Saxophone Colossus
Dave Brubeck - Take Five
Kenny Burrell - Midnight Blue
Charles Mingus - Ah um
Art Blakey - Moanin'
Thelonious Monk - any riverside recording 

Blues:
Willie Dixon - I am the Blues
John Lee Hooker - It Serves You to Suffer
Taj Mahal - Giant Step/ Ole Folks at Home
King Biscuit Boy - S/T
Lightnin Hopkins - Strikes
John Mayall and the Bluesbreakers - "beano"
Alex Korner's R&B from the Marquee - Ace of clubs label - beg, borrow or steal a copy of this album! 

Paul

Marsalis & Clapton ---  Wynton Marsalis & Eric Clapton Play The Blues  CD/DVD

Les McCann & Eddie Harris  --  Swiss Movement

Howlin Wolf  -- The Chess Box

Various Artists  --  Jazz in a R&B Groove  Vol 1

Mingus -- Oh Yeah

Various Artists  --  The 100 Best Jazz Tunes of The 1950's    Box set

Aretha Franklin  --  Aretha's Blues: The Delta meets Detroit

Not that I know much about jazz ...... and got enough blues of my own.

Stan Kenton- Machito
Horace Silver-Song For My Father
Hank Mobley- Soul Station
Eric Dolphy- Out to Lunch
Sarah Vaughn + Clifford Brown
Brad Mehldau Trio-Art of the Trio
Lee Morgan- The Sidewinder