Peel hard boiled eggs using your preferred method (or buy the already peeled kind at your grocery store). Slice each egg in half lengthwise and separate the yolks into a medium-sized bowl.
Add the blue cheese and mash the yolks and blue cheese together with a fork or potato masher. Stir in Ranch dressing, mayonnaise, sour cream, Dijon mustard. Add salt and pepper to your liking.
Grab a ziptop bag and fill it with the yolk mixture. Cut a small corner off, forming a makeshift piping bag. Arrange egg whites on a tray and pipe the yolk mixture into the holes. Top with blue cheese and bacon crumbles. Garnish with fresh dill, if desired.