Peter Norvig - Checkout his page, and his books PPIA, AIMA
Sandi Metz - Watch her talks
Rich Hickey - Watch his talks
Raymond Hettinger - Watch his live coding sections
Brian Kernighan - read "The Pratice of Programming"
Richard O'Keefe - read "The Craft of Prolog"
John Carmack - The master of constraints and doing more by doing less
Jan Weilemaker - maintainer of SWI-Prolog, read the code
Linux Linus - His stubborness and meaniness has kept Linux together, if he was too passive, the kernel would have been a mess. Design by committe rarely works, someone gotta own it. He owns it.
OpenBSD Theo - Unix systems are better secure because of Theo's stubbornness, lots of branches end up incorporating changes that started from OpenBSD.
TJ Holowaychuk - I think he writes 10,000 lines of code a day
PHP Nikita Popov - The kid is brilliant
Anthony Minessale of Freeswitch
Moxie Marlinspike - the guy that brought us signal
Kyle Kingsbury aka Aphyr, checkout Jepsen, checkout his clojure tutorial.
Sergio Moreira, Nagra - famous PSX Hacker