I kinda agree with everything apart from this comment, which is based on your own respect for aphex, and not really in fact.and if you take all the mad wierdness in techno it will always trace back to aphex
When he start outed he was merely a poor carbon copy of the european mad electronic industrial noise producers, and true experimental electronik body music had been going on since the late 70`s and early 80`s, so his sound can be traced back to Throbbing Gristle, and possibly NON, Clock DVA etc
But this is all subjective, we all have our own legends, and this question is subjective, their is no true answer. You can keep tracing things back, until really you end up with the inventors of the equipment.