Sansa is my bet for the only person who survives. Like Texas, she refuses, in the face of all continuing evidence, to believe in any reality outside her own worldview. She's going to ironically walk blindly through and past every last danger and safety, completely missing the ill intentioned, the well intentioned, and the indifferent. She'll be so irrelevant, she misses the apocalypse.
I don't think that reverance or respect for the dead needs the dead to be hidden from sight completely. It is the attitude that you bring, as a witness to a dead body, that matters, not the display and witnessing of a dead body, per se.