everything about Father Elijah indicates that he was always a sociopath. House is questionable.
How so w/ Elijah? He's disregards human life and suffering; breaks tradition, laws, international agreements against war crimes...he's self aggrandizing, afraid of nothing, and has no regrets whatsoever.
As for House, I agree. He's definitely egotistical to the extreme. Whereas he doesn't need to be perceived as 'antisocial' in order to do whatever he wants, so that's a wash. I have seen him scared, and his actions certainly indicate great caution so he's not fearless. Remorseless does seem to fit for the most part, but I think he does lament mistakes in a rather clinical way.
Also, sociopath is a really confusing term. Sometimes it just means non-standard moral values, as opposed to lacking empathy. Other times it distinguishes between social and biological causes (psychopathy).
I'm surprised the Enclave didn't try and evacuate them to the oil rig. They would have fit right in.
Big.Mt was strong enough to survive the bombs, so they would have just taken up space. I do think the Enclave expected to reclaim Big.Mt though. The crater shape and general disarray after they blew up the top, probably looked like an impact sight from a distance though.
Just imagine if the Enclave got their hands on teleportation, matter recombination, or advanced brain preservation tech. Personally I'm picturing a congress of former Presidents because none of them die, they just lose the nomination. That and them being utterly unstoppable.