Kent Beck and Andrei Alexandrescu.
Andrei is quite amazing to me...
Clearly capable of writing code that is wonderful... and incomprehensible to mortal man.... but wonderfully focused on not doing that.
On making it comprehensible, and producing facilities that are friendly and nice and doing so with a kindly attitude.
Kent, in addition to the stuff he has done on the TDD front... https://www.infoq.com/presentations/self-image/