April 23rd. St George’s Day. St George is, of course, the patron saint of England. And the Scout Movement. I’m not sure he existed, but he definitely killed a dragon to rescue a princess. That makes him a fearless hero, unless you regard dragons as an endangered species. That would change your perspective.
But Aidan didn’t kill any dragons. He doesn’t buckle a swash like George.
So my counter-proposal would be St Arthur. He had the courage to take on a dragon. And lost.