It really depends on what you consider an important farmer. For example George Washington Carver discovered peanuts to help farmers from depleting ground nutrients from growing cotton. Or John Deere who invented the plow.
The Jungle brought light to the harsh reality of the working and food conditions. The book helped the passage of many Federal food safety laws.
In 1774 the First Philadelphia Congress was held, in which the settlers drafted a document protesting the intolerable laws and sent them to the English. However, the government did not give in, and on July 4, 1776, the Second Philadelphia Congress took place, in which the colonists broke with the English, proclaiming their independence, with George Washington as the leader of the troops. England once again did not give in and the War of Independence of the Thirteen Colonies began. With French support, the colonies won in 1781 and their independence was recognized in 1783.
In 1787, a constitutional charter was enacted, which made the country a Presidential Federative Republic, with George Washington as its first president; it ensured civil rights and freedom and divided power into executive, legislative and judiciary. However, this freedom was relative, as slavery continued, women did not have the same rights as men, and Indians continued to be driven from their lands.
Even with their independence, the colonies continued to diverge in politics and economics, leading to conflicts that led to the Civil War.