Tellus Ghost Theme
Tellus - Purchase
$24 - Tellus is a single column Ghost theme that provides a very nice look and feel to the home page and to the articles. Tellus has everything you need built in and also has one of the nicest implementations of search I have seen so far in a Ghost blog.
The small details of this theme really make it stand out. Such as the little red ribbon that shows up on a featured post and being able to see the number of comments on the home page. Tellus definitely seems to be on the higher end of the single column Ghost themes out there.