I'd nominate Bill Hicks as an icnoclast - he refused to sell out, as I understand it.

On the other hand, I thought the thread title (TT?) referred to Mudcat posters - which of them is iconoclastic?

I'd suggest *daylia* (how DO you pronounce *, as distinct from 'asterisk'?), and most of the contriburors to the History of Britain part 1 and The three-minute egg and the dull and very unimaginative thread er , threads.