I feel like
Akecheta and Dolores represent the two extremes.
Akechetarepresents the dream of a peace. He believes that there is a place free of blood and violence, a place where they could be safe. A beautiful but an impossible dream. Dolores on the other hand represents fury and wrath, The name Deathbringer suits her well for I can see her ending humanity. It’s a small chance but with the knowledge of the most powerful people on our planet Dolores can wreck an untold amount of damage on our world. Perhaps end it as well but it will always be a Pyrrhic victory. Bernard on the other hand seems to represent the middle path.
Meanwhile I think Maeve is the future. I think she is going to be the one to inherit the world left by the other three(i can’t see either of these three surviving)