NextJS is (by far) the best of the bunch, because it isn't limited to SSG.
The parent listed static site generators including Gatsby, Hugo, and Jekyll. I suggested NextJS is a superior option to those 3, because (among many other things) it supports "export" of a fully static, pre-rendered site, which puts it -- unambiguously! -- in the "JAMstack SSG tools" category. So I'm baffled by the downvotes, and your dismissal.
What am I missing? Thanks in advance!
PS Edit to add: NextJS is even listed, as the 1st result, in the parent's jamstack link!