Your vote for greatest (covers) album

When I was teenager I bought an album just for the cover art but it turned out to be one of my favorites and it is the album was           Oxygene by Jean-Michel Jarre the artwork was the planet earth peeling away revealing a skull 
Yes had some great album covers by Roger Dean

Ok then Emerson Lake and Palmers cover of Modest Mussorgsky's Pictures at an Exhibition 

Hi,
I’m your fan, The songs of Leonard Cohen
Patti Smth, Twelve

Not sure it's the "greatest", but one of my favorites is Rickie Lee Jones - It's Like This.  Check out Tom Jones - Reload also.