I humbly suggest we consider Grateful Dead's landmark "American Beauty". This fall 1970 release on the Warner label made a very fine showing of itself on the MoFi vinyl reissue.
Perhaps licensing rights could be directly obtained from Grateful Dead Productions to consider bringing "Blues For Allah" into the Tape Project fold. This was released on GD Records and IMHO is an often overlooked masterpiece (in addition to having my favorite rock album cover of all time)