I really like how you contrasted the philosophies, politics and personalities of the two men, and brought in Orwell for further illumination. Although I'm not sure if you meant to, you make a case for the idea that a person's personality, philosophy and politics tend to be extensions of one another.

Camus is the more sympathetic character to me in the framework you define, as he seems to be for you. That said, Camus' philosophy has never come to my attention, and I've read some of Sartre and explanations of his thought by others.

I think Sartre's core phenomenology is brilliant. I relate his core thought to Husserl (and Heidegger). My understanding is Sartre was inspired by Husserl, but then bought more of a edge to it -- as if saying "Husserl gives a good account of consciousness, but now that we have his account, what does this mean for us, and how are we to live, given that meaning?"

I think of (Sartre's) existentialism as his answer to those questions. I don't see Sartre's prescriptions as necessarily useful, but to me they provide an excellent platform or framework for making one's individual decisions -- the idea you need to define meaning and purpose for yourself, and make your choices accordingly, setting aside what others tell you. (And one of my choices is humanism.)