who is the most experimental band/person everrrrrr?

The Future of Music: Credo
I believe that the use of noise to make music will continue and increase until we reach a music produced through the aid of electrical instruments which will make available for musical purposes any and all sounds that can be heard. Photoelectric, film, and mechanical mediums for the synthetic production of music will be explored. Whereas in the past, the point of disagreement has been between dissonance and consonance, it will be, in the immediate future, between noise and so-called musical sounds. The present methods of writing music, pricipally those which employ harmony and its reference to particular steps in the field of sound, will be inadequate for the composer, who will be faced with the entire field of sound. New methods will be discovered, bearing a definite relation to Shoenberg's twelve-tone system and present methods of writing percussion music and any other methods which are free from the concept of a fundamental tone. The principle of form will be our only constant connection with the past. Although the great form of the future will not be as it was in the past, at one time the fugue and at another the sonata, it will be related to these as they are to each other: through the principal of orginization or man's common ability to think.-----John Cage, 1937

Okay, I'll just go to hell now.

Cage gets my vote too, but this prediction seems way off. The 12-tone system is pretty much dead. I guess if 'bearing a definite relation to' means 'ignoring completely', he got the future right. Then again, there's still a lot of future still to come. Communism will almost certainly come back at some point; why not Serialism too? Once you've invented something, it will be used.

...the use of noise to make music will continue and increase until we reach a music produced through the aid of electrical instruments which will make available for musical purposes any and all sounds that can be heard.

...mediums for the synthetic production of music will be explored.

...it will be, in the immediate future, between noise and so-called musical sounds. The present methods of writing music, pricipally those which employ harmony and its reference to particular steps in the field of sound, will be inadequate for the composer, who will be faced with the entire field of sound.

...percussion music any other methods which are free from the concept of a fundamental tone.

That's pretty insightful for 1937. Turntablism, IDM, Industrial, Avant-noise all potentially fit the bill he's describing. But 12-tone could make a comeback! teehehe.....

Cage didn't like improvisation, which fits because that means having to give up control.

He left a lot of this 'noise' stuff (a lot of which is accepted as procedure now) and went towards looking the silence as music route, all acoustic stuff towards the end wasn't it?

Cage was happy to lose control, as long as it wasn't to musicians. Improvisation puts musicians in control of composition, and that's often a recipe for formula, routine, habit or, worst of all, music that sounds like music. Cage preferred to see control ceded in two directions: towards Mother Nature (in the form of chance operations and random ambient sounds) and towards the listener. But, since he 'signed' these strategies, both Nature and the listener are 'caged'. The very act of relinquishing control becomes a godlike assertion of control. Cage's most brilliant invention, in fact.