* Jonathan Edwards: He is best known for his sermon "Sinners in the Hands of an Angry God," delivered in 1741, which is considered a masterpiece of American Puritan preaching.
* Jonathan Edwards, Jr.: This Jonathan Edwards was the son of the famous preacher and is also known for his preaching, though not as widely as his father. He had a significant influence on the Great Awakening, but there isn't a single sermon that stands out as his most famous.
If you can clarify which "Johnathan" you mean, I can give you a more specific answer.