One of my favorite albums from the 90s has possibly the lamest cover in jazz history - not offensively bad or distasteful, more along the lines of “high school portrait”: https://upload.wikimedia.org/wikipedia/en/b/b4/Groove_Elatio...
If you had shown me this cover without me knowing who John Scofield was, I would have assumed this album was particularly dorky elevator music. But it’s great stuff: https://youtu.be/QBWTJ--Son8
That said...... there are cases where you can probably judge books by their covers: http://www.zonicweb.net/badalbmcvrs/letmetouch.jpg