My vote would have gone to Crick and Watson
THE MORE GENETIC DIVERSITY, THE MERRIER
Unlike Feynman , Newton or Hawking, Einstein married his Cousin. Freud as it turned out was too smart for his own good as well as those unfortunates who embraced his theories. Psychoanalysis did not work for Woody Allen or for the ditzy Goldie Hahn whose self described tribe is Jewish but she now practices Buddhism and calls it Jewbu.
This article bears out the understanding that Jewish groups remained largely closed and did not assimilate genetically with Gentile populations.
Personal belief- this disparity accounts for major Jewish intellectual contributions to Western Civilizations as well as aberrant intellectual ideas such as Marxism and Multiculturalism as first developed by the Frankfurt School. WADR