Who created a steam engine powerful enough to drive steam powered war ships?

The steam engine powerful enough to drive steam-powered warships was significantly advanced by Isambard Kingdom Brunel in the 19th century. He designed the SS Great Britain, which was the first iron steamship to cross the Atlantic Ocean. Additionally, Robert Fulton is credited with developing one of the first commercially successful steamboats, which laid the groundwork for steam-powered vessels, including warships.