All you need are graphic designers. Plugin help should come with your host (if not, you should consider another host) unless you are looking for custom plugins. And builders, really? They're going to get advantages over normal players for building?? Anyone can build, just build everything yourself, it not only shows you are committed but you have time to work on the server. You're probably looking for builders because you're bad at it, but really who needs good buildings for a server? It's a game filled with kids, no one is going to critique your spawn.