A bold, heroic or daring person — someone notable for bravery or extraordinary deeds (often somewhat literary or old-fashioned).
彼は若いころから町で豪傑として知られていた。
He had been known in town as a bold hero since his youth.
その昔、豪傑たちが村を守ったという伝説が残っている。
There is a legend that daring heroes once protected the village.
彼女は豪傑とは言えないが、困っている人を放っておけない性格だ。
She can't be called a heroic figure, but she can't leave people in trouble alone.