For me Thanksgiving is: Philadelphia Fish House Punch, Alice Waters' Potato Gratin, No-Knead Thyme Dinner Rolls, Red Wine Cranberry Sauce, Stuffing with Bell's Seasoning or Kale and Cranberries, and Ronnie Hollingsworth's Most Excellent Squash Pie. In other words, the turkey is optional. I would be happy with butternut squash lasagna. That said, I love nothing more than leftover turkey (or ham) sandwiches with my grandmother's mustard sauce. Here's a PDF for printing convenience that includes most of these recipes.
And here are a few more ideas: