here’s one of each. I freely acknowledge that when it comes to visual appeal one man’s Monet is another man’s Thomas Kinkade, but I think most folks would agree on these:
> great cover: Never Mind the Bollocks Here’s the Sex Pistols
> great album / dreadful cover: Doctor Alimantado, Best Dressed Chicken in Town
Had you asked for great covers with awful music inside we could be here all day of course.
A related endeavour which merits discussion – great packaging and marketing. This can extend well beyond the album cover. PIL’s Metal Box springs to mind, as does The marketing campaign for Supertramp’s Breakfast in America which included life-size waitress stand-ups, menus distributed to retail outlets etc.