I think this is a very good thread and captures the majority of narcissists who are actually not self-aware and not conscious of how their actions, words and ways of seeing the world hurt other people.
My ex was very much in this camp. He simply doesn't register the feelings and needs of others, doesn't feel other people's opinions and perspectives are valid if they differ from his, and is impervious to logic and reason if it conflicts with his feelings. He also seems to have a memory like Swiss cheese, and frequently claims to have no recollection of promises he's made, things he's said or done, or how things happened (I realise he may simply be lying). He has a tendency to rewrite history to cover these gaps and to seem flabbergasted when you can provide hard evidence that his version of history is fictionalised.
He also has a tendency to be passive-aggressively punitive when he feels aggrieved, though of course the things he does always have a degree of plausible deniability about them, so it's impossible to know whether his behaviour is genuinely subconscious or whether he has some level of awareness that he's being punitive.
It makes him immensely frustrating to deal with. There's also no way to truly know if his claims of lack of bad intent and memory loss etc are true, and if any suggestion is made that he did or should have had some kind of awareness of how his words or actions would affect others, he will become deeply indignant and act like a victim.
My ex definitely lies to cover his tracks a lot, but I often think that the first person he lies to is himself. He convinces himself that his actions are perfectly justified and the only fair way that he can get what he wants. He understands well enough that other people will see things differently, so when he lies to them to cover up what he's done/doing, he feels he "has to" do so because he's convinced himself that their perspective is invalid, even if it's backed up by something as substantial as the law. He just does mental gymnastics to explain why the law is stupid and wrong or 'most people are just over-sensitive' or everyone else is just understanding the situation wrong and his position is perfectly fair.
It's exhausting. I just deal with him as little as possible now (we have children together so it can't be avoided entirely for a few more years), which he massively resents as he cannot grasp why I don't like him and feels the fact that I don't want to be friends with him is an outrageous insult.