Whatever you think of Snowden, you can hardly claim that what he's done has directly affected any conflicts for the better
I don't care about the Nobel Peace Prize one jot, but if I did, I'd definitely want a prize for Assange, though he is a very controversial figure.
I don't regret the sarcasm: your presumption that defining what can be classified as a veritable struggle for human welfare can, in turn, be used as an argument for which struggles are most deserving of praise is what is called a straw man argument, perhaps the most annoying fallacy to refute before an audience of undecided thinkers as it is effective despite being logically inconsistent.
To suggest otherwise is in my opinion, utterly naive, but in the very least shortsighted.
Conflicts aren't always bad. We just need conflict resolution.