Yeah, this is something I’ve been slowly exploring, too. There aren’t a lot of great options yet, and my personal opinion is that we have yet to see a platform that’s purpose-built to be a Fediverse CMS. Hubzilla comes the closest conceptually to this idea, but unfortunately it’s closer to Drupal than it is to WordPress.

Bonfire remains an extremely interesting prospect, I feel as though it might be possible to create something very similar to the Ghost experience with Bonfire and extensions. It might be worth reaching out to their devs and having a discussion about publishing capabilities.