There's a few hundred thousand still in uniform. After all, it's not like he only leaked things he subjectively felt were instances of "domestic surveillance", in which case we might be able to have a different conversation about his actions.

Failing that, there's the people in a certain country whom Greenwald himself claimed would be put directly at risk if that country name were to be revealed. But WikiLeaks leaked it anyways.... which is directly attributable to Snowden.

But that's the beautiful things about things like what he does. It's like coal polluting the air... we know it kills people in the abstract, but you can't point to a slouched-over body directly attributable to any given lump of coal.