Who was not at the Constitutional Convention but was present during the writing of the Declaration of Independence?

Thomas Jefferson was not at the Constitutional Convention, which took place in 1787, as he was serving as the U.S. Minister to France at the time. However, he was a key figure during the writing of the Declaration of Independence in 1776, as he authored its initial draft. Jefferson's contributions to the founding documents of the United States were significant, even though he was absent during the later formation of the Constitution.