Focuwriter is great. Especially if you just want to write on a blank canvas without distractions. Great for long form, write from the head. My next favourite is Marktext, which I use more for manuals and such in non fullscreen mode. Obsidian for notes and lots of referential info. Qownnotes for snippets related to computing. Logseq for work related notes. If I would still have a Mac, add NValt based on notational velocity.
https://gottcode.org/focuswriter/