Your vote for greatest (covers) album

What's that I hear?  The songs of Phil Ochs.

Lol, in the spirit of the A-goner who thought album covers, not song covers, I remember when Roger Waters’ solo album “Pros & Cons of Hitchhiking” was released in 1984, the girl on the cover had a naked behind.    Then, the Moms Against Yucky Album Covers (or whomever) made a stink and all subsequent releases had the black box over her rear end.   I was 16 and had to have the “right” cover.    
Again, sorry, I know we’re talking song covers here, not album covers.    

Haha
Yes That was quite a ludicrous incident.
I do own the copy with the lady in question proudly displaying her derrière!

A full on cover album is hard to come by. Early Stones and Zeppelin covered (or "borrowed") extensively.

Jeff Buckley has the single greatest cover of Leonard Cohen’s Hallelujah.

Current favorite/fun covers are from Lake Street Dive.

A better question is who’s cover’s are better than the original. As in see above...