I currently use Keycloak with vouch-proxy[0] to secure services on my personal self-hosting server. It seems to be quite slow, and much more heavyweight and complex than I need . Is this something Ory can solve for me? Is there any documentation similar to this situation?

[0] https://github.com/vouch/vouch-proxy

For a similar use-case I found the oauth-proxy a decent standalone solution:

https://github.com/oauth2-proxy/oauth2-proxy

It allows me to put different services behind oauth-logins, with confidence. Not too heavyweight or complex, and has a decent history of good support.