@ThaTruth, it's "7 Aurelius." One would have thought, considering the fact you list him as a favorite, that you would know his name ;p
i forgot RZA from my list. Dre is like a given. even people who don't listen to and even like hiphop refer to dre as the greatest producers of all time.
basically, this thread is impossible. "your top 15 producers" would have been easier lol.