Final answer:
Benjamin Franklin was the gray American patriot and signer of the Declaration of Independence who acted as the chief diplomat for the colonies during the Revolutionary War.
Step-by-step explanation:
The gray American patriot and signer of the Declaration of Independence who played the role of chief diplomat for the colonies throughout the revolutionary war was Benjamin Franklin. Franklin was known for his diplomatic skills and negotiations with various European countries, most notably securing a crucial alliance with France. His contributions as a diplomat greatly aided the American colonies in their fight for independence.
Learn more about Benjamin Franklin's role as chief diplomat during the Revolutionary War