I don't know if they have a reach outside the upper Midwest, but that seems to describe Schwan's. They have a wide variety of premade foods ready for reheating or cooking (e.g., cheesy potato puffs). Haven't gotten food from them in a while, but I remember it being pretty good. At least, far better than supermarket frozen meals. I've actually been known to follow a Schwan's truck until it stopped so I could buy on the spot :-)

They typically have a number of households on a weekly rotation and deliver in temperature controlled trucks. You can buy food when they show up at your house or if you're well-organized, preorder.

They probably also ship.

Ignore the "salmonella vanilla" remarks: that was a long time ago :-)