Who fought at anchor in plattsburg bay to nullify royal navy long guns and maximize american carronades, and won the most strategic naval victory in the war of 1812?

The correct answer is Thomas Macdonough

He was a famous war officer from the United States  that defeated the British navy at the Battle of Lake Champlain which launched him to military stardom. The battle itself was a battle in the larger Battle of Plattsburgh which was a decisive battle in winning the entire war which is why the victory in the war is often ascribed to him.