This isn't a theoretical question for me. I've applied to and been declined from all the companies you listed (except tarsnap because I didn't see a careers page). What exactly do I do then? Do I then just decide that food is overrated and be content with not having paycheck?
Let's not also forget that most companies go broke, and realistically most of us don't have any ideas that are likely to make a sustainable business.
I'm not saying that you shouldn't try and find an ethical place to work for or start a business, I'm just saying that it's not as easy as "just apply to places that don't suck".
Automattic has apparently gone insane, but that's not the same as evil.
Valve might be the closest to a HN-agree on "good company" - and even that has a comment below mine attributing gambling to them.
It is only a matter of time...