You're basically looking for people like Stallman, who is a very rare kind of person. He thinks about the principles he would like to advocate for and then he fleshes out how these principles interact and how to deal with tensions or contradictions.

Most people who declare their affinity for a value or policy or position merely do so tactically; they think that there's a short-term relationship between the furthering of some movement and their ability to get closer to what they want. Such people are allies when convenient.