Best way to share group of reports with various departments?

Imagine you have a retail operation.  Lots of stores nationwide.

You want to make a group of dashboards for the general manager of each store to see.

You also want to make dashboards for the dept managers of each store to see  (GMs could also see them)

Then you want to make dashboards for some individual line staff by department as well.

What would be the best way to share this info?

Would you publish to a teamsite for each group (GM, dept managers, and line staff)?

Then add people to those sites via making an AD group that correlates to each one?  "StoreGMs" as one AD group for example?

Just wondering how people are finding ways to do this well?

Thanks!