Believe it or not Sabbath is listed on Prog Rock Archives......I never thought they were 'prog rock' but they do have progressive elements at times. At any rate this is how the members rated their best albums over the years:
Paranoid 4.31
Black Sabbath 4.23
Sabbath Bloody Sabbath 4.14
Master of Reality 4.08
Heaven and Hell 4.07
Sabotage 4.05
13 3.73
etc...