Hero or Villain?

In the story of Beowulf, there is a hero that comes to this town to slay a monster that has been bothering the town recently. This hero, Beowulf, eventually kills the monster. Everyone is happy. However, what the citizens didn't realize about killing that monster is that it was only the true monsters son.  Once Beowulf finds this out, he challenges himself to take on the mother. Once he goes into her layer, he is astonished by her beauty. She makes promises of riches and glory if he slept with her. He falls into the temptation and goes back claiming victory over the monster. Many years later, a dragon comes to terrorize the town and Beowulf is able to slay the dragon. Even though he was able to save the townspeople, he falls short in saving his own life. Right before his death, he saw that the dragon he killed was actually his son born from the gorgeous charmer.

Now that we've passed the preliminaries of the story, many argue that Beowulf was a hero, but I suggest that his actions reveal more villainous qualities. When reading this story, it leaves a peaceful image that Beowulf “the great” has rid this town of that horrid dragon.  He saved the defenseless and unprepared townspeople. This was very heroic. However, may I suggest that the dragon would have never been there if it weren't for Beowulf falling into the temptation? From the depiction of the movie, many homes were completely destroyed, many innocent people killed, and it almost resulted in the murder of the queen and his mistress. This selfish act to sleep with the beautiful monster, affected the lives of many, even after his death. Both sides hold equal weight in this argument. He did bring wrath upon the town. Nonetheless, he owned up to his mistakes by killing the beasts even if it meant sacrificing his own life.