Currently, this wiki has plenty of large navboxes. However, I'm not sure they are the best tools for the job in their current form. They have poor usability due to being hidden and providing lots of links in close proximity with little context. They also create lots of redlinks and large amounts of repeated data across pages.
I'm not necessarily thinking of removing navboxes entirely, but make them a lot more focused. Each one would be focused on a single group with clear connections between all the members of the group.