Who was famous during the time of 1776-1791?
Given the time period that you are asking about, I assume that you are asking about people who were famous in the Americans colonies and the early United States.
In the United States, the most famous people were the founding fathers that we are all familiar with. These are people like George Washington, Benjamin Franklin, Thomas Jefferson, John Adams, James Monroe, and Alexander Hamilton. During those times, political figures were the only really famous people. There were no real literary figures in the United States and there were no famous entertainers. Therefore, the founding fathers were the most famous people.