Perseus best proves he is a hero with great fighting skills by

Perseus, the son of Danaë and Zeus, is famous for his bravery and fighting skills which he demonstrated in several mythological passages, but two events stand out: the slaying of Medusa (who could turn men into stone), the only one of the Gorgon sisters that was mortal, and the slaying of the sea serpent that was terrorizing the people of Aethiopia, and saving, in the way, the life of the beautiful Andromeda who he would later marry.  

the answer should be the first one. "many people find his lyrics very moving."

it by far makes the most grammatical sense and is very objective, removing any first person from the original sentence and keeping with the sentence fluency.