I think Brotzmann is in a class by himself.
Hell, Stone/Water has some very Ellingtonian arrangements, and the Brotz/Miller/Moholo trio (as the Brotz/Parker/Drake) have sure taken a path far from the Ayler tree. When you get Bennink and Van Hove in the mix, it's yet another story altogether - theatrical, sure, but more on the neo-dada trip, with a little Roland Kirk or Jaki Byard thrown in for good measure.
Yeah, Flaherty too is in a class by himself. I would like to hear that Orange LP, which is very rare and supposedly his first appearance on wax.