Benedict Evans
Evans is excellent at crunching numbers and visually displaying what that data means in a meaningful way that makes sense.
This week, he gave a presentation at the Wall Street Journal's WSJD conference, in which he spoke about the power of mobile. Evans also gave the presentation at Andreessen Horowitz's a16z Tech Summit.
Disclosure: Marc Andreessen, co-founder of Andreessen Horowitz, is an investor in Business Insider.