Who'd really want their favourite band lumped in with the likes of James and Lars, Scott and Charlie, and Dave and his Ego. I realise they all have massive egos but Dave Mustaine's takes up a tour bus on it's own, the rest at least share the bus.
Leave the Big 4 as it is and lets bands like Exodus, Testament, Overkill and Flotz do what they do best, kick arse!