In my opinion you are looking for a new CMS, can I suggest Craft CMS? It is Laravel / PHP based, very simple to use for both programmers and clients.
You do not need to write PHP to use the framework, much of the work is done building data structures in the dashboard, and outputting using simple template tags called "Twig".
It is React / Vue ready, although they are not really necessary. You might want to look at some static site generators such as Jekyll or Statamic also.