I am using Publii to manage my site now. It is a locally installed/managed static site generator/CMS that builds and uploads your site content to a variety of hosting providers. I have it using Github Pages as my provider.
I like Publii because of it’s simplicity. I can choose a dropbox/drive folder to store site files/data in, I don’t have to worry about supporting a backend, or keeping a server running at all. I know that sounds nitpicky, but it’s one less thing to worry about.
Options and theming within Publii are surprisingly straight foward. JSON configs for options/templates, handlebars for templating. Coming from WP the learning curve is there, but it’s not unmanagable.
While I did buy this theme I am using currently, I’ve also modified it to a good extent to suit my own needs.
I also like that I don’t have to login to write. My last WP install was behind a HTTP pass + the WordPress login. Not a big deal, no, but it’s nice to not have to worry about that.
Anyways, if you are using WP as an SSG, I suggest giving Publii a shot.