Q magazine is a British magazine that has been around since the mid-‘80s. While its U.S. counterparts seem dead-set on always putting a scantily clad babe on their covers or shoving in non-musical content that supposedly fits the same demographic, Q is all music. Over the years, they’ve put out a number of best-of-all-time album lists. I’ve averaged 23 of them together (see resources for all the lists here) for a ranking you won’t find in any of their magazines.
Also, check out Q’s annual picks for album of the year. They have made such picks just since 1999, although they’ve done end-of-year lists since 1986. However, by looking at the consolidated lists described above, the list has been expanded back to 1965.
Many of the all-time and annual lists can all be found at Rocklist.net.