Thinking back in time a bit, 1971 was a smasher. In Search of Space, Faust, 10001 Centigrades, Acquiring the Taste, Inner Mounting Flame, In The Land of Grey and Pink, Aqualung, The Yes Album and Fragile, Nursery Cryme and so on.
Any year fro the 80's has a bunch of cracking thrash records, too.