Your vote for greatest (covers) album

"Caroline Now!" - The Songs of Brian Wilson and The Beach Boys

"Looking Into You" - A Tribute to Jackson Browne

The reverence that many of the participating artists have for the songs that they cover is palpable (YMMV). The Jackson Browne tribute was curated by overlooked and underrated singer/songwriter Jimmy LaFave (Austin, TX); and, Bob Ludwig does the mastering, so the sound quality is sterling.

"Stoned Side of The Mule" Gov't Mule

Cover art  
The Clash: London Calling

Cover song
Cake: I Will Survive (Gloria Gaynor song)

album cover: Osibisa Woyaya

best song: Y sharp, and the short electric guitar solo at at the end of that song, which starts at 4:35 minutes into the song, is still unmatched by any artist or any band still to date ( https://www.youtube.com/watch?v=N5-t8THAGx8)

Bryan Ferry- Dylanesque