its by no means an all time classic , but why not try 'free jazz classics Vol1 & 2' by the Vandermark 5 .
Its 2 CDs of their interpretations of tracks by Ornette, Archie Shepp , Eric Dolphy etc . Its an excellent buy & may give you some pointers of what artists to look out for , it has for me since it was recommended to me by another member of this board.
Albert Ayler - 'Spritual Unity ' or 'Spririts Rejoice' 2 fine ,fine CDs.