Let There Be Rock
Full Moon Fever
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I don't know what breed of metal Opeth are but I tried a couple of their albums (Blackwater Park, the one with all clean singing) but didn't like it. Don't know the others and I don't care to.
Try Dissection - Storm of the Light's Bane. Melodic black metal from a band with a rather sordid history. Also Ulver - Nattens Madrigal is one of the best black-metal albums but pretty roughly produced.