There should be a service similar to Mozilla's TLS configuration generator[1], but for SSH.
Mozilla does have a wiki page with modern and intermediate SSH configurations[2], but I'm not sure whether the advice is still current, and a configuration generator page would probably be more accessible. I wonder if they would be open to creating one.
Good point about the sshd_config generator. Who knows, people might even use it.
As to the up to dateness of the Mozilla Guidelines: it is not. Just see the entry "UsePrivilegeSeparation sandbox" which has been deprecated since 7.5 [0]
There should be a service similar to Mozilla's TLS configuration generator[1], but for SSH.
Mozilla does have a wiki page with modern and intermediate SSH configurations[2], but I'm not sure whether the advice is still current, and a configuration generator page would probably be more accessible. I wonder if they would be open to creating one.
[1] https://mozilla.github.io/server-side-tls/ssl-config-generat...
[2] https://wiki.mozilla.org/Security/Guidelines/OpenSSH