Haven't seen this one yet but in my opinion the only movie of his where his performance deserved an oscar was "What's Eating Gilbert Grape." Most of his other roles have been good but not next level.
If you're talking about what's eating gilbert grape he was playing a disabled kid I don't know what you wanted.
Also at calmthelovelytits it's a great movie, honestly my favorite and it's on netflix if you have an account or knlw someone with one.
While it will obviously be a spoilerthon if you haven't seen the movie, there is a comedy podcast called "The Dollop" http://thedollop.libsyn.com/dollop-x-hugh-glass that did a show on Hugh Glass. Funny *and* informative.
Also at calmthelovelytits it's a great movie, honestly my favorite and it's on netflix if you have an account or knlw someone with one.