Addition to @PatJ answer:
Keep in mind that an uninstall/deactivation functions won’t trigger. So in case the plugin(s) in question leave back a lot of DB entries, you’ll have to manually clean up the DB.
Another option would (maybe) be to use WP CLI and try to manually trigger any uninstall functions. This will only work for plugins not properly coded, because if they are, then the functions won’t trigger if it isn’t a uninstall task or the nonce checks will fail.