Very nice tool, I hadn't seen that before thanks!
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...