In your specific niches and domains, however big or small, who would say have been real pioneers who've held steadfastly to a vision of the world based on their own unique set of values?
Getting a free C compiler and the rest of linux userspace was a massive deal.
The archtype has to be Ted Nelson [1]. He is frequently discussed on HN [2].
Computing direly needs directions that expand outside of helpless consumerism. Litt is a fine fine example of someone with actual human vision, who chases Douglas Engelbart's dream of Augmenting Human Intellect.
1. Steve Jobs
2. Elon Musk (before the twitter madness)
Those two changed the world, or at least how the world see things.