It seems like there’s a lot of ways to go about this that may be overkill, so I’m curious which may avoid that.
Low maintenance in this context is aiming for moderate technical knowledge/setup, lower cost, and portability in case you need to migrate your site and so minimal hassle in that process.
Definitely Jekyll or Hugo on GitHub pages.
I use Ghost CMS because I wanted an easier mobile editing experience, it is also very low maintenance in its container form.