= Hans Bethe
{c}
{wiki}
Head of the theoretical division at the <Los Alamos Laboratory> during the <Manhattan Project>.
<Richard Feynman> was working under him there, and was promoted to team lead by him because Richard impressed Hans.
He was also the person under which <Freeman Dyson> was originally under when he moved from the <United Kingdom> to the <United States>.
And Hans also impressed Feynman, both were problem solvers, and liked solving mental arithmetic and <numerical analysis>.
This relationship is what brought Feynman to <Cornell University> after <World War II>, Hans' institution, which is where Feynman did the main part of his <1965 Nobel Prize in Physics laureate>[Nobel prize winning] work on <quantum electrodynamics>.
Hans must have been the perfect <PhD> advisor. He's always smiling, and he seemed so approachable. And he was incredibly capable, notably in his calculation skills, which were much more important in those pre-<computer> days.