What about a WYSIWYG editor app like Dreamweaver? I don’t know if there’s any good free ones any more though, now that FrontPage Express is gone.
So weirdly enough, I posted about this earlier today in a different community. My use-case is different to OP’s, so I don’t think any of the options I’m investigating now would suit them, but the long and short of it is free, standalone WYSIWYG editors are really few and far between now.