People say Boris are heavier, even though Meat Loaf is one fat bloke, Boris are three smallish Japanese people, and one is a female, so I say Meatloaf is still heavier.
The Weather Girls are heavier still. The Electric Light Orchestra sound really heavy, but they are nothing like as heavy as the London Symphony Orchestra. There are loads of them.
Objectivity, please, people. There is an answer to this one.