Best double live vinyl?

Gotta give a shout to Zappa/Mothers-Roxy&Elsewhere.  Pretty close SQ wise to Columbus given Franks sonic perfection personality.  There are some overdubs on it though.

plus one for Little Feat.

I also love the Who "Live at Leeds'. I recently picked up a remastered version done by Abby Road Studios. "My Generation, Magic Bus" side is very nice indeed.

Humble Pie - Rockin' the Fillmore

Rory Gallagher - Irish Tour 74

I’ll second @xcool with “Live Rust” - Neil & Crazy Horse

These may require 2 purchases to combine vol. 1 & 2 with some releases, but they are essentially live-double albums:

“In Person Friday and Saturday Nights at the Blackhawk” - Miles Davis Quintet

“Live at the Golden Circle Vol. 1 & 2” - Ornette Coleman Trio

A “Historic Concerts” release double-live LP featuring Max Roach and Cecil Taylor @ McMillin Theater, Columbia University 1979 is a stunning (if not particularly conventional) listen

Double Live Gonzo.

Frampton Comes Alive sold the most.