I'm going with Burial. Been playing his music through my headphones all week after not listening in about a year and I'm still as gobsmacked as when I first heard it. I've never heard electronic music with so much feeling and power before. From his debut album through to the Truant / Rough Sleeper EP has to be one of the best, most consistent periods in any electronic artists category with the Kindred EP and specifically Ashtray Wrap the absolute pinnacle of everything he has done. His last two releases were a little sub par unfortunately but I can ignore that for the sheer volume of excellent music he has released.