- Single static page (netlify as host or similar)
- Wordpress (sitegrounds as host)
If you want premade templates to just modify some images / cut out content, I would use themeforest
Specifically these links
https://themeforest.net/category/marketing/landing-pages?sor...
https://themeforest.net/category/marketing/unbounce-landing-...
Technically all you really want is an email signup link at the end