You dont say what kind of website it is, just not blog or documentation style.

But SSGs can be skinned a bunch if different ways, and have been set up for a bunch of different purposes.

https://github.com/myles/awesome-static-generators

I have been using Zola for myself lately, its less blog post and more article oriented, but still doc heavy. I like the duckquill theme (with… More than a few changes, but still), which I doubt fits what you want. For comparison, here is duckquill: https://duckquill.daudix.one/

But you may like the Portio theme: https://quentin-rodriguez.github.io/portio-zola/

If you don’t need to update often though, I think some basic html could be the way to go rather than using an ssg.