Faces Supernatural Foes and/or Receives Supernatural Help
The hero is never a braggart or even willing to take the applause. A hero doesn't do good for fame and rewards that he gets but because those deeds need doing. Beowulf was very humble when he helped people and didn't want to be put up.
Most epic heroes receive aid from a god or goddess or battle some superhuman enemy. Beowulf fought monsters and superhumans, such as Grendel and his mother.