I think we need to keep it more seminal contributions to the industry/technology. If you're going to pick estats, then how do you leave out Sanders/Sutherland? Or even Harold Beveridge? But as far as stats, it would have to be Quad, KLH and Janszen.
Lord John William Strutt, 3rd Baron of Rayleigh - developed the duplex theory of human sound localization (the basis of stereo as we know it). He also wrote The Theory of Sound Vol. 1 during a cruise down the river Nile with his wife.
Nikola Tesla - first proved the feasibility of radio transmission (the US Supreme Court overturned Guglielmo Marconi's patent of the radio in favor of Tesla)
Thomas Edison - invented the light bulb, without which we wouldn't be able to read the liner notes on the LP jackets in our dark listening rooms.