It's been said before, but the Lightning must be a strong contender. Do I really recall formation aerobatics by nine of them at the RAF Gutersloh airshow in 1975, or maybe it was only(!) five Lightnings and four Hunters...
Suggesting the Vulcan is also not original. A stream take off from Finningley following a simulated scramble at an airshow there in the early 1970s is one of the noisier memories of childhood.
An honourable mention must go to the Soko P2 Kraguj, a single piston trainer of Balkan origin which apparently exhausts through megaphones rather than silencers, and which made a lasting impression on arrival at a Leuchars airshow a few years back.
And, of course, Concorde, which amongst its many achievements probably brought more noise into the lives of more people than any other aircraft. You never had to look up (but always did, just to appreciate the beauty) to identify one flying over on arrival or departure.