Initially I thought to use a roof and adjust all the edge cuts individually. No sure you could get exactly this.
But, if your up for creating an object, I think its the RULED form you are looking for. With the top and bottom the same "plan", should be pretty simple.
Also, I suppose you could try a simple COLUMN (tool, not an object) and use the Z rotation to get it leaning. You probably have to SEO the top and bottom if you want them level.
Duane
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