Honestly, there aren't that many clan ranks because there isn't much of a need for them. In a group of maybe 5-6 forum-active people, if I were to promote who deserved it to a higher rank, it would just push 4 of them up, so we have 4 leaders leading 2 other people. That doesn't make any sense.
The ranks that are in place now are pretty solid based on the types of responsibilities that I can delegate.
Elite - Full privileges, meaning they can control member ranks, invite and withdraw invites, can kick members, and can edit the clan thread.
Recruiters - Can simply send invitations. I usually bump people up to this rank after I see how they judge people on the Recruitment thread. I have a few candidates right now that I might promote in the near-future, I just want to see that they're consistent.
Regular Members - No privileges, simply a regular rank for regular people.
I would love to have leaders of different departments, such as an Art department, an Event department, etc. However, we don't have enough members to warrant that level of micro-managing. If you guys can get enough members into [elite] (that are quality members) then I'll definitely be adding new ranks and whatnot.
The only new rank I'd be fine with adding would be the Quiet Ones; individuals who are active in-game but don't ever talk on the damn forums. I only keep them because we need the in-game publicity.