It's weird but the Tribe doesn't seem to have a leader in the alpha respect. William is nosy about what everyone is doing - especially keeping track of Norbert - but he's not the boss of everyone. But they all seem to have their special privledges that no other cat can take over. William gets preferred snuggle spots on the bed w/ us. Percy and Norbert get the comfy chair in my office to sleep in. Pippin gets personal scratch time from Dad on the guest bed and deck promenades. Tiger gets shoulder rides outside where no other cat is allowed and gets to "drive" the big red truck.
Otherwise, they share the status of top cat on any given day, without much fuss. They all wrestle with each other (except William & Norbert) and all seem to know the other guys' limits. And they all have unique relationships to us which I think helps with them getting along. They all get what they need from us attention wise so there is no competition for that.
They are a very nice family to have!