Most fantasy authors are formulaic and derivative. Most of them have nothing more than a few "oh, that's an interesting idea" moments in their books. There are exceptions. One exception that I mention frequently is Solaris by Stanislaw Lem, which is a profound book regardless of how you want to characterize it.

I suspect you're going to find a lot more relevant science fiction than you will relevant fantasy, because science fiction has so many more ways to be relevant, from dystopian warning novels like 1984 or We or Fahrenheit 451 or Brave New World (all of which are probably literature with the possible exception of the last, which is pretty weak), to heavier science fiction like Arthur C. Clarke and Isaac Asimov (or Lem, as I previously mentioned).

Fantasy, by its very nature, tends to escapism or absurdity. Once you drop down dragons or elves or fairies or Canadians, the relevance to the real world diminishes automatically. Yes, you can have parables, or fairy tale-type stories with a moral (this is where children's fantasy actually thrives, like the Narnia books or the Harry Potter ones, both of which have value in the realm of children's literature), but chances are if you're writing that type of story you're not doing it to comment on the human condition.