After a few mins of more thinking...

Perhaps the idea of an "official" group is not wise.  Instead, the core dev team could create an organization, with special logo and name. This organization would be the de facto official group, but only so long as it held up its reputation. At all times, other groups can form and compete for "de facto officialness."

In essence then, this would just be a Non-profit, spontaneously organized by individuals. If multiple such organizations sprout up, then each community member can support whomever they wish.

Think of it like a market for competing representatives. No group official by law, but any group official by market sentiment. We would see one group come to dominate the sentiment, but Bitcoin would not be irrevocably tied to it.

No group should be granted an explicit monopoly... but an implicit market-derived monopoly would not bother me.