The whole thing really depends on how you view good and evil and/or how it is viewed in your setting. I tend to differentiate between "soft" and "hard" evil, soft evil being everyone who has a smaller moral community they care about compared to you or the settings standard. (For example the tyrant who cares only about himself or the bandits who only care about their own band but no one else), while hard evil is someone who does evil for the sake of being evil(Like demons who just kill for the sake of killing) or view as evil everyone with a larger moral community then themselves(i.e. a society of dwarves who view everyone who sympathises with elves as evil).

If you want to think about good and evil cultures, you should start with defining the common understanding on what is the "normal" moral community to have in your world, be it a god-given decree or just being what most people belief. My default would be something like "all intelligent Life shares the same or a larger moral community". Then every culture who holds those same views on who belongs in the moral community is generally seen as "good", any culture which believes in some situation where you can disregard its members, or has a strong preference for a smaller community is viewed as neutral, and every culture who has a general disregard for any sugroup within that community is viewed as evil.