Doctors Ray Muzyka and Greg Zeschuk aka Biodocs

Famous for: co-founders of Bioware

Follow them on Twitter (Muzyka and Zeschuk)

As the co-founders of Bioware (which they created fresh from medical school), they're responsible for everything from Neverwinter Nights to Mass Effect, Dragon Age and, most recently, Star Wars: The Old Republic. Their influence on gaming, and more specifically, RPGs, can't be overstated. Also, they're fucking doctors.