Last week I discovered write.as/WriteFreely which seems like a great alternative to Ghost. I started using Ghost because I really liked their Markdown editor and the ability to write posts on mobile. Unfortunately, with the new release of Ghost they have changed their editor to look more like Medium, and it's a bit buggy on mobile. Now while I really like Ghost, their target market is teams. I'm currently using a paid theme that seems more suited to a single author blog, but it's not ideal.
Write.as has an iOS mobile app and even a Linux desktop app. It looks great, is also open source and even federates with Mastodon! I guess the main thing will be to see if I can port the more than 100 blog posts I currently have on here over.