Let cream cheese and sharp cheddar come to room temperature. In the bowl of a stand mixer fitted with a paddle attachment, combine cream cheese, cheddar cheese and ranch dressing mix. 

Transfer cheese mixture to a sheet of plastic wrap and use plastic to form cheese mixture into a ball. Refrigerate for at least 4 hours, or overnight. Can be made several days ahead. 

Right before serving, press crushed pecans into cheese ball. Place on a serving plate. Slice the tips off of two black olives and one cherry tomato. Use toothpicks to secure to cheese ball. Add pretzels for antlers and serve.