I've just been reading through the best selling albums by year page on wiki and there are a great mix of good and bad albums on the list and I was interested to see what people thought of the albums on the list. 
I started the poll from 1993 as doing a poll from 1956 is a bit much
but here is the rest of the list:
1956 Carousel - Original Soundtrack
1957 The King and I - Original Soundtrack
1958 My Fair Lady - Broadway Cast recording
1959 South Pacific - Original Soundtrack
1960 South Pacific - Original Soundtrack
1961 G.I. Blues - Elvis Presley
1962 West Side Story - Original Soundtrack
1963 With The Beatles - The Beatles
1964 Beatles for Sale - The Beatles
1965 The Sound of Music - Original Soundtrack
1966 The Sound of Music - Original Soundtrack
1967 Sgt. Pepper's Lonely Hearts Club Band - The Beatles
1968 The Sound of Music - Original Soundtrack
1969 Abbey Road - The Beatles
1970 Bridge Over Troubled Water - Simon and Garfunkel
1971 Bridge Over Troubled Water - Simon and Garfunkel
1972 20 Dynamic Hits - Various Artists
1973 Don't Shoot Me I'm Only the Piano Player - Elton John
1974 The Singles: 1969–1973 - The Carpenters
1975 The Best of the Stylistics - The Stylistics
1976 Greatest Hits - ABBA
1977 Arrival - ABBA
1978 Saturday Night Fever - Original Soundtrack
1979 Parallel Lines - Blondie
1980 Super Trouper - ABBA
1981 Kings of the Wild Frontier - Adam and the Ants
1982 Love Songs - Barbra Streisand
1983 Thriller - Michael Jackson
1984 Can't Slow Down - Lionel Richie
1985 Brothers in Arms - Dire Straits
1986 True Blue - Madonna
1987 Bad - Michael Jackson
1988 Kylie - Kylie Minogue
1989 Ten Good Reasons - Jason Donovan
1990 ...But Seriously - Phil Collins
1991 Stars - Simply Red
1992 Stars - Simply Red
I can't believe Oasis were beaten by Robson and Jerome in 1995!
Poll coming soon with the list.

I started the poll from 1993 as doing a poll from 1956 is a bit much
but here is the rest of the list:1956 Carousel - Original Soundtrack
1957 The King and I - Original Soundtrack
1958 My Fair Lady - Broadway Cast recording
1959 South Pacific - Original Soundtrack
1960 South Pacific - Original Soundtrack
1961 G.I. Blues - Elvis Presley
1962 West Side Story - Original Soundtrack
1963 With The Beatles - The Beatles
1964 Beatles for Sale - The Beatles
1965 The Sound of Music - Original Soundtrack
1966 The Sound of Music - Original Soundtrack
1967 Sgt. Pepper's Lonely Hearts Club Band - The Beatles
1968 The Sound of Music - Original Soundtrack
1969 Abbey Road - The Beatles
1970 Bridge Over Troubled Water - Simon and Garfunkel
1971 Bridge Over Troubled Water - Simon and Garfunkel
1972 20 Dynamic Hits - Various Artists
1973 Don't Shoot Me I'm Only the Piano Player - Elton John
1974 The Singles: 1969–1973 - The Carpenters
1975 The Best of the Stylistics - The Stylistics
1976 Greatest Hits - ABBA
1977 Arrival - ABBA
1978 Saturday Night Fever - Original Soundtrack
1979 Parallel Lines - Blondie
1980 Super Trouper - ABBA
1981 Kings of the Wild Frontier - Adam and the Ants
1982 Love Songs - Barbra Streisand
1983 Thriller - Michael Jackson
1984 Can't Slow Down - Lionel Richie
1985 Brothers in Arms - Dire Straits
1986 True Blue - Madonna
1987 Bad - Michael Jackson
1988 Kylie - Kylie Minogue
1989 Ten Good Reasons - Jason Donovan
1990 ...But Seriously - Phil Collins
1991 Stars - Simply Red
1992 Stars - Simply Red
I can't believe Oasis were beaten by Robson and Jerome in 1995!
Poll coming soon with the list.
and that is Back to Black by Amy Winehouse
Their debut, Night Work and Magic Hour are all brilliant albums.) Shania Twain (not a dud track on it!) and Robbies Escapology.