I'm not a fan of metal album covers. Mostly coz a lot of them (not all) consist of skulls, blood, bones, uhh stains, anything to make the album look "dirty", and texts that you can hardly understand and of course, bad layouting. I only enjoy a few of them (metal covers). Here are my recent top picks for my favorite album covers in the metal genre and beyond.
DARKEST HOUR - ETERNAL RETURN
FOO FIGHTERS - ECHOES, SILENCE, PATIENCE AND GRACE
MUSE - THE RESISTANCE
BRANDON BOYD - THE WILD TRAPEZE
PORCUPINE TREE - DEADWING
STONE SOUR - AUDIO SECRECY
DEFTONES - WHITE PONY
EVERY TIME I DIE - NEW JUNK AESTHETIC