I would have to say Xypherous and Seriff.
Xypherous is very thorough with his writing..
And Seriff referred to D2JSP as a "namedrop", which is basically just an infinite number of bonus points in my book.
Problem is though is that the interactivity Riot has with the community makes them all pretty awesome and having worked with my own production group I know for a fact there are probably some of them that are less vocal because they are so busy keeping everything running for us. Programmers, Engineers, Server Managers, Technicians...