Hi.
I would like to suggest adding degrees.
For example, there are two founders of the rp group. But at the moment there can be only one, so it slightly overstates the importance of the founder. What's more, you'd can set ranks such as two leaders, four deputy leaders, ten elder members, and an unlimited number of regular members.
I even have an idea on the name colors (in the group's menu) corresponding to ranks: members would be in the default color, elder members would be in green, deputy leader(s) would be blue, and the leader(s) would be purple.