And the answer is, unequivocally, no NONE. NONE MORE HEAVY:

From this MeFi post with several other worthwhile links.

Observations gleaned from various comment threads on this:

First, amazingly, “War Pigs” is only eleven years after Buddy Holly.

Second, N.B. what a tiny drum kit Bill Ward plays compared to modern metal drummers. It does not seem to slow him down.

Finally, how the hell did Mrs Heathen and I not know this was happening at the 9:30 club that night?