My amounts assume it is a full meal- if a reception (not at a regular meal time), you need about 20% less.

veggie tray, veggie tray page
green salad, top of plan for 100 page

It is quite difficult to plan for this many entrees, because it depends so much on local preferences, but here is a possible combo:
baked ziti with meatballs, about 75 servings

spiral sliced ham,
chicken/peppers/sausage casserole,
kielbasa & sauerkraut,
I personally would skip either the kielbasa (most likely) or the chicken and sausage. 2 ounces ready to eat ham, 3 ounces sausages per person

sandwich tray, 1/2 sandwich (2 tea sandwich size) per person. I would probably offer small rolls and let people make their own from the ham and other fillings- easier and wastes less- made sandwiches don't keep if not eaten