Which of these men was not a business tycoon in late nineteenth century America?
There was many men that were a business tycoon in the late nineteenth century. The one I remember hearing about the most is John Rockefeller. A list can be found by visiting http://en.wikipedia.org/wiki/19th_century#Business
Without the list of men I can not tell you who was not a business tycoon in the late 19th century. However, Talcott Parsons was a famous sociology professor in the 19th century.