Depends on what you’re looking for. If you’re deadset on wysiwyg editors, then yeah, onlyoffice is as good as it gets if you want to keep it foss and don’t like libreoffice. Otherwise people seem to like the many scientific markdown editors. But honestly if you already know emacs then just… emacs. I’m in academia too and with the right set of packages it can fit an academic workflow pretty nicely. I write in org mode with org-superstar, olivetti mode to center text in org, varying fonts and font size for headers, citar for references (that syncs with a realtime bibtex export from my zotero library). With the added bonus of having all the usual goodness (magit, projectile, you name it).