More than one.
Not just one craftworld though, and that's something that *can* happen in 40k, whereas there's no indication that can even happen in SC, so it doesn't really show a difference between them.
Weren't Dark Archons bad in Brood War? I thought they saw some niche use super lategame sometimes but they definitely weren't busted.
Well, they can in the legacy of the void campaign IIRC.