The mythical hero known for his strength and exploits against monstrous beings is Heracles, also known as Hercules in Roman mythology. He is famous for completing the Twelve Labors, which included slaying the Nemean Lion and capturing the Ceryneian Hind. Heracles' feats often symbolize the struggle against chaos and the triumph of order, reflecting the virtues of bravery and perseverance in Greek culture. His narratives highlight the interplay between human flaws and heroic ideals, making him a timeless symbol of strength and valor.