As of a few years ago, the didn't manufacture their dw's, fridges or microwaves. All were re-badged other products for more dollars. If you have to have it all matchy-matchy go ahead, but I'd buy based on the item's performance before I'd match.
My kitchen is 5+ years old and my DW is Miele, cooktop is DCS, fridge is a built-in Whirpool, micro is Sharp, warming oven is dacor and the ovens are Thermador. The warming drawer, fridge and dw are integrated & wood paneled, but the rest seem to work just fine.

My fridge isn't a Whirlpool it's a Kitchenaid- a first cousin if you will!

The Dacor freestanding fridges I've seen are rebranded, somewhat restyled Whirlpools. Not sure about the built-ins. Their dishwashers, by contrast, are their own unique design. They started making them a few years ago and quickly proved disastrously unreliable, reportedly flooding several kitchens, and were taken off the market. They reintroduced them about a year ago, hopefully after fixing the problems. They sure look and feel rugged, but their long-term reliability is an unknown. The 30" wide model is a unique entity, the first offered since GE stopped making them decades ago. The tub on the 24" model isn't as tall or deep as recent LG or Samsung DWs though.