Question: who is the richest man to ever live in america?
Answer: Warren Buffett. Adjusted wealth*: $63.8 billion. Andrew Mellon. Adjusted wealth*: $63.2 billion. Samuel M. Walton. ...  Moses Taylor. Adjusted wealth*: $54.5 billion. Russell Sage. Adjusted wealth*: $53.6 billion. James G. Fair. ...  William Weightman. Adjusted wealth*: $51.8 billion. John D. Rockefeller. Adjusted wealth*: $253 billion.