Greatest living mathematician and expositor?

On Twitter I posed the following question: I got a great repsonse. Here is the complete—unedited—list of names (in alphabetical order). Micheal Atiyah Art Benjamin Andrea Bertozzi Manjul Bhargava Joan Birman Bela Bollobas Stephen Boyd María Chudnovsky Fan Chung John H. Conway Ingrid Daubechies Keith Devlin Marcus du Sautoy Jordan Ellenberg Joe Gallian Rob Ghrist…