How come no one mentioned opeth here? Listen to nectar on their morningrise album and you'll be hooked... my arms your hearse is a heavier album worthy of the black metal genre... but my favourite is still

COF - dusk and her embrace and midian
moonspell - wolfheart
dimmu borgir's - enthrone darkness triumphant
emperor - anthems to the welkin at dusk
therion - theli, vovin
pantera - the great southern trendkill

of worthy mentions are theatre of tragedy, rhapsody, children of bodom, amorphis, in flames which has all been mentioned in this thread...