LibreOffice, OnlyOffice, both have been a great since I switched away from Office 365—feeling I get overcharged for a function I will not use—for use with Nextcloud. It is even better to get a $39 ('refurbed' license for Office 2024) if you have to use (MS)Office.
Onlyoffice is awesome, if you’re buying recycled keys you may as well just MAS it since they’re both technically against TOS.
... they are marked as `refurb` at the reseller I use, but they are mostly just bulk licenses; although I do not know how they do this (Note: they are official resellers).