There must have been a gallery component, since I only looked at generators that had one available.

Honestly, in hindsight the templates were really not a big deal. Just for fun, I tried converting the Hugo template I used to Pelican, and it was easy for me.

Pelican is solid and mature and I would use it, in hindsight. The only major flaws are that it's much slower (but makes up for it with incremental builds) and that the community is much, much smaller. On the plus side, Jinja2 is much, much, much better than Go templating (Hugo borrows from Go).