I just finished the five books by Sharie Kohler in what's called The Moon Chasers series. Waiting on book six to come out. Meanwhile I'm currently devouring book two of Joss Ware's Envy series. Envy is what the post apocalyptic survivors and their descendants call what's left of Las Vegas (North Vegas was spared). So far there's action, romance, some smex but mostly character and relationship development, zombies, beings who may or may not be immortals and/or aliens, most of the world's land mass gone.....for you men who like after the end of the world novels, you may actually enjoy Joss Ware's writing since there is plenty of story there.
Anyone interested in a tamer post apocalyptic book(s) should look up Maia Underwood and Ellen Connor.