For me, I've got to say it's Simon Posford. Mastermind behind Shpongle, Hallucinogen, Younger Brother. When it comes to psytrance, it's impossible to not hear his name.
What sets him apart from other producers? Well, aside from pretty much crushing every genre boundary that exists, the overall flow in his music, and the types of sounds he creates, shows a creativity I've not seen before in other producers. He is also known to travel to many different countries and get live recordings of exotic instruments and singers.
From what I've seen, his setup looks mostly analogue.

By far my favorite track by him: