Potential CMS candidates:
* Bolt — https://bolt.cm/ supposedly really simple to use and to theme
* Joomla — https://www.joomla.org/ lots of add-ons and extensions available; has a weird mindset that one must absorb as far as where an item posts in the site hierarchy
* WordPress — https://wordpress.org/ most used ... and therefore, most attacked; they do frequent updates and patches, though; because of its gigantic ecosystem, there are themes and extensions for all sorts of things
* MODX — https://community.modx.com/ seems like the number of pre-made themes and extensions is smaller than Joomla and WordPress
* Concrete5 — http://www.concrete5.org/ one of the things I liked about C5 is that it appeared to allow editing right in the page itself (based on user permissions, of course). It seems like it would be a better choice for a site with non-technical editors.

There is also #Drupal ( https://www.drupal.org/ ) and its fork #BackdropCMS ( https://backdropcms.org/ ), but Drupal is really just a set of frameworks for building your own CMS. It gets really complex quickly. If you’re going to build dozens of sites with it, then it is worth learning all the pieces and how to fit them together with your own customizations. If you’re building one or two sites, look elsewhere.

I should just try a few of them out.