Just to name a few :
Sid Meier, Peter Molyneux, Geoff Crammond, Shigeru Miyamoto, the people at Infogrames & Electronic Arts
, the people who were making games on the Spectrum platform
, Liquid Design (the makers of Slam Tilt), Irem (the makers of Moon Patrol, R-Type
), Matthew Smith (for Jet Set Willy : How can such a simple game be so addictive & fascinating
), David Braben & Ian Bell (the makers of Elite), Marc Cerny...
The inventor of micro-switch, applied to joysticks (although not all good joysticks had micro-switches...)
Might not be exactly the kind of answer that Codetapper expected, but the time when an individual coder made a great game is long gone, inmho...
I assume he's interested in coders with exploit pedigrees, operating in highly competitive areas not game designers per se.