Einstein, e.g. (6)
(Other definitions for emigre that I've seen before include "Person who settles in another country" , "One forced to leave one's country for political reasons" , "One living abroad for political reasons" , "Person moving abroad" , "One fleeing" .)
(Other definitions for genius that I've seen before include "Mastermind" , "Person with unusual mental ability" , "Great intelligence" , "One has an extraordinary talent" , "One has exceptional ability" .)