6. Mastodon Leviathan (2004)
I could have easily picked every single Mastodon album for this list, as all of their cover art/packaging is amazing, but Leviathan has always been my favorite. I mean, come on, how many bands do you know that can write an entire concept album based on the greatest American novel ever written and continue that story visually into their album packaging. Paul Romano was responsible for this masterpiece.