Corath is still effectively lawless since anyone who can beat up anyone else wins everything. The police is effectively impotent and is ceding all real power it has to control the town in order to pretend it enforces the law, which is not good but cowardly and a sign of wanting the power of the law without the duty to enforce it fairly, which is arguably evil. Nestor and Uncle are both not nearly good guys from what I've seen. Slightly underhanded competition may not be evil but when you're willing to kill people to do it (especially people in what should be a tightly-knit post-apocalypse city), you definitely are.
Other than nestor very few ever really take advantage of the arena. Everyone just solves their issues privately and the peace of the town is kept. The police has so much firepower no one makes trouble. They are definitely not evil. Tho the deputy is. Same with the deputy at sedit actually.
The value of life in that world isnt very high tbh, and even good people like william ask you to murder others with little trouble.
Crimson Caravan missions involve murdering the Cathedral member (morally highly dubious considering he's pretty harmless at this point in the timeline) and Sedit Caravans are CLEARLY evil as fuck. Only Frederyk's Caravans can qualify as good guys.
Jesus dude, its a post apocalyptic setting in which life holds no value and there literally is no law or state that can guarantee the safety of its citizens. Sedit caravans is trying to expand, so it stands to reason theyll step on the little guy to do it. You need to get rid of your baggage and look at the conflict from the standpoint of someone living in that place. The Cathedral member wanted to kill the leader of the caravan had he had the chance to do so, he was a bastard.
William is one of the few characters actually going out of their way to help people.
And he asks you to murder his neighbor, want to know why? because life has no real meaning if there isnt anyone that can guarantee your safety and keep things fair.
Tribals/New Hope are OK (both are basically required to be decent to each other because a tribe that can't get along disintegrates). None of them are really important or big on the world stage, so they don't count for much. Both can basically be summarized as "so irrelevant that no one evil has bothered wiping them out" (the end slide for New Hope had them wiped out by the petty gang in Rat Town for me).
I made new hope great! as for the tribals, they are the only faction that cares about human life actually, they are too good to survive contact with almost anyone.
Mutant Hunters are described as the lone force preventing the ghouls from killing everyone in the game world. The place is effectively a warzone (was actually a warzone an indeterminate amount of days previously).
Sure, that doesnt make them good. They are fanatics and will take over the world and burn anyone with a sign of mutation of torture them and experiment on them till their lifes are expended. Make no mistake, these are some evil assholes.
What do soldiers do during war? Talk about killing as many of the enemy as they can.
Except the enemy isnt just rebirth, its pretty much anyone.
And lets not forget that the whole world just narrowly averted the Master/Super Mutant threat. Not saying they are "good guys" per se, but there is no reason to make war on them by assassinating one of their leading members when you're risking the safety of the biggest city in the game world by doing so.
I would have murdered them all if it wasnt such a big pain in the butt to do. Rebirth being evil assholes doesnt make the mutant hunters any less evil.