orificespace
I always found it rather shocking that Hughe Le Caine is always left out of the discussion even though he pretty much built one of the first synthesizers in the mid 40's. Gave it a hilarious name (Electronic Sackbut) then proceeded to make kick ass music that rivals some of the more creative IDM artists today.

That said this machine is awesome. Love switches on wooden panels.

Toenails
You guys are just making names up. Well, three can play this game:

I think the classic overlooked synthesizer virtuoso would be Chad Kneepads. Him, along with Gretta Gilligan (a.k.a. Tracy Legs, a.k.a. The Human Tornado, a.k.a. Sandwiches), pioneered the ability to compose songs out of farts recorded on magnetic tape.

chairsforcheap
i don't know lecaine but if you don't know moog and theremin you're a tard nuts. Which you are.