After reading the Pyramid essay, I would like to discover what lies in the top most chamber of black and death metal. Realism would be my pick, but that comes from a more death-oriented metal upbringing.
Either lower tiers of pyramids intersect one with another or the lower tiers come to resemble one another. For example, America's top most chamber probably contains Liberty. Liberty has corrupted Realism at the lower tiers, suggesting an overlap. Capitalism at a lower tier beneath Liberty has joined with or assimilated a tier under Realism.
Hence, most metal is going to suck. Different pyramids hold more sway during different eras. Liberty is the largest pyramid during our era and its broad base of lower tiers has swelled into the adjacent competing pyramids.