Beaver Builder is a page builder and the pro version gives access to dynamic data. Beaver Themer is an addon plugin that allows you to create theme templates. Themer allows you to create custom headers and footers, but you will need a theme that has Themer support for these. It was one of the first theme builders and is still one of the easiest to use. In addition to support for creating templates using dynamic data, it also provides conditional display options. This solution is known as one of the most stable options available and rarely has any update bugs or security issues.
Beaver Themer is a Beaver Builder add-on that allows you to create templates for your post types.
Visit the Beaver Builder with Beaver Themer Website