head *****
chief ****
top dog

He was like that, always had to be top dog.

That he'd be a top dog in the new order.

The course for top dogs is more of a test.

A player is the top dog who calls the shots.

Young gun comes to town, tries out the top dog.

Most of them want only their own turn as top dog.

Just keep your cool and you'll yet emerge as top dog.

Feeling myself start to sweat, I looked for the bar and someone with the air of top dog.

Yes, who's got in the hierarchy of power, who really is top dog?

Don't go thinking the thyroid is the top dog, however.