Hmmm... I might bump my character down to S-rank- Callos is right, to a degree, in that the guildmaster wouldn't get much play.
That said: I do not think that we should have no guildmaster at all. Absolutely not. Or, at the very least, we should have a 'leadership council'.
...actually here's an idea: the 'guildmaster' is more like the... say, head of a board than a single leader. Our Fairy Tail is lead by a council, consisting of those considered responsible enough (which may or may not = S-Rankers - I kinda like the idea of members of lower power being on the council), and they, collectively, make decisions. The guildmaster brings issues, and moderates, but doesn't have more power than any other councilmember.
Thoughts?