Is a swept boss the best selection to use when trying to create a slight angle in the bottom of a rectangular pan that has a hole in the center

I have a rectangular pan that has a hole in the center.  The hole is lower than the edges.  I am trying to use a swept boss to create a solidbe tween the edges of the pan and the center hole.  I have a cross section I am trying to swept but no luck. 

Is the swept boss the best when to do this?

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