In large frying pan, sauté sausage breaking up into small bite-sized pieces until done. Remove with slotted spoon to paper towel-lined container or bowl. Set aside.
Leave sausage fat in pan and add butter. Melt over medium-low heat and add next 12 ingredients. (Up to mushrooms.) Sauté until vegetables are tender. Add mushrooms,. and sauté another few minutes. Remove from heat. Add sausage, grapes, and pecans.
In very large bowl or small stock pot, add dried bread cubes. Add chicken broth and eggs and fold a few times to lightly combine.
Add mixture from frying pan and fold until evenly mixed. Add goat cheese, a third at a time, and fold until evenly mixed in as well.
Transfer stuffing mixture to a large, deep *sprayed* baking/roasting dish, or 2 regular-sized ones (one 13x9 plus second small pan) if needed. Dot top with 4 Tbl. butter. Cover tightly with foil.
Place into preheated 350º F oven and bake for 1 hour. Remove foil and bake 5 minutes longer.