Primary contact indicator in table

Let's suppose we have a table that shows a list of users and their basic contact information.

First Last 1 | Phone 1 | Address 1
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First Last 2 | Phone 2 | Address 2
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First Last 3 | Phone 3 | Address 3

...and so on.

We want the user to 1) quickly understand which user is the primary contact for the account and 2) be able to quickly designate a different contact in the table as the primary contact.

Initially I was thinking that the primary contact should be the first row (by default), bolded, and a "filled star" icon could be added to the left of the name. Other contacts would have an "empty star" icon. Clicking on the "empty star" would make that entity the primary contact, bold the row (and move it to the top of the list when the view is next opened.)

What I'm struggling with is that a star icon usually means "favorite" or "follow up on this", not "this is a primary x of a collection."

I also struggle with putting the primary contact at the top of the list and then everyone else under it in alphabetical order -- that feels wrong.

What's a better way to indicate this?