Guru and visionary
Unlike some others, I'm not so fed up with the term "expert." Yes, it needs to be qualified to what extent your expertise lies, but terms such as "guru" imply that you're beyond an expert in something; that folks should be showering you with rose pedals or sacrificing goats in your honor. And, hey, if you're a guru, why do you need a job? Self-appointed royalty titles only make most people feel like you're going to be a huge pain-in-the-butt to work with.