[Gorwingel]

This is a hard question because there is just so many ways we can go to answer this. We can go by pure numbers (Turin, Hurin, etc.) or we can go by bravery and doing what was needed to be done at the time. I have to admit that when answering a question like this, I don't really personally think that Frodo, Sam, or Eowyn would be the best answer. It is just that they were really not people who made their livings as fighters. They just fought because it was a situation of life or death, and the survival of the peoples of Middle-Earth.

So I would most definitely have to go with Hurin. Slaying 70 trolls is a pretty unmatchable feat.