OpenBSD out of the box is not minimal. As a base install it is more feature full than most linux base installs. It is small yes, but with a lot of high quality network focused services. I could easily run a company backend and network on only what is found in the base install. If I had a good solid group of people I could probably run the frontend on it. (the main thing it lacks is a web browser).

mail, web, routing, tunnels, bgp, dns, hell there is even an ldap server in there for some reason. but no ldap client, which kind of sucks.