Almoststatic has blog capabilities, each blog page can have an intro image and a brief introductory text.

With Almoststatic you can use a custom menu on each page

Even static websites can have comments to their blog pages. But require some external services.

Use captcha to prevent automatic filling forms by robots and to prevent spam. With a little JavaScript and e backend check you can write your own captcha.

With some CSS and JavaScript you can add animations to your site.