J.P. Morgan was an American financier, banker, and philanthropist who dominated corporate finance and industrial consolidation in the late 19th and early 20th centuries.
John W. Gates, a prominent American industrialist, pioneered the mass production and distribution of barbed wire, transforming agriculture and ranching.
Edward H. Harriman was a prominent American businessman and financier, instrumental in the growth and development of railroads in the late 19th and early 20th centuries.
Charles Tyson Yerkes, an American transportation magnate, dominated the rapid transit system in Chicago during the late 19th and early 20th centuries.