born 1938
Donald Knuth is an American computer scientist, mathematician, and professor emeritus at Stanford University. He is renowned for his contributions to the development of the analysis of algorithms and the creation of the typesetting system TeX, as well as his multivolume work "The Art of Computer Programming," a seminal work in the field of computer science.
The secret to doing good research is always to be a little underemployed. You waste years by not being able to waste hours.