So many have occupied that bit of mental shelf over the years - Nevermind, Fire of Unknown Origin, LZ IV, Sabbath Bloody Sabbath, Five Miles Out, Sgt Pepper's, No Fuel Left for the Pilgrims, Psychomodo, Astro Creep 2000...
(Smashie and Nicey voice)
...and many more!
but then, I do tend to hammer certain LPs to death before moving on. I got reminded of the existence of Vision Thing the other week after not hearing it for probably the thick end of 20 years, downloaded it for the car for a long drive and knew EVERY word.*
*except for one misheard one which I now prefer to the actual one.