Of the brands I've used, I think Norrona, Arc'teryx, and Patagonia are all currently making the best quality outerwear overall. Their patterning, fabric choices, fits, and tiny construction details all just seem so dialed.
Flylow, Trew, Strafe, Open Wear, Mammut, Rab, Outdoor Research, and The North Face are all really close, too. I'm sure I'm forgetting some others, but those are the brands that have impressed me the most.