Can't believe no one has mentioned Alex Lau yet. I was unsure about whether I would ever successfully use Roux, or actually ever understand F2B (I was averaging some not very good move count for First Block, and something worse for Second Block), but he took the time to basically walk me through the way he solves F2B, which both heartened me about my ability to use Roux, and helped me cut down my average move count for F2B. That he was willing to put no small amount of time into helping me instead just saying "blockbuildnstuff" still inspires me every time I get a good F2B (or a bad F2B... or an average F2B... or I'm using ZZ).
Also, Kirjava (and tOOtl, Mollerz, and everyone else on IRC), who tolerates my not quite constant requests for assistance on IRC no matter how dumb my questions are, who inspire me to give full answers to the people who ask me questions that seem to me as basic as my questions must seem to them.