Leslie Lamport. There are a dozen larger than life programmers out there, but reading his biography I was struck with a kind of resigned sorrow at the concrete expression of a certain ideal life that I always wanted for myself and know I'll never achieve. BS from MIT at an absurd age, math PhD, goes on to write TLA+ which is a marvel of sophistication. Turing Award.
The king kind of has to be Dennis Ritchie in my mind, I can't think of code that's more influential in general and definitely in my life than C and Unix.
I like Rich Hickey a lot, what he's done and judging from his talks his personality.
More obscure but this guy Fabrice Bellard is an animal, he puts out this insane amount of sophisticated code like, oh btw guys here's a fully working LTE stack.