at the bottom of the heap
In the worst or lowest position in a group. As far as our government is concerned, kids born into poverty are just at the bottom of the heap, perpetually ignored.
at the top of the heap
In a position of total or complete superiority; in a place or position above all others one is or was competing with. To think that I started in the company mail room 10 years ago—now I'm at the top of the heap! The champions end the season at the top of the heap yet again, despite being counted out for much of the year.