Surprisingly, or perhaps not, at least a few of my favorites have already been mentioned. But I'll elaborate.
I have owned a couple of Arc’teryx jackets for many years, and they function as good as new. Obviously very high-quality outdoor gear.
I was an early Patagonia customer, and have several jackets, one of which I bought in the early '80s, and it still looks and functions very well. I haven't checked recently, but they had lifetime guarantees on their gear for a long time, and I took full advantage twice. One was a jacket that was over 20 years old. The zipper broke, so I brought in into a shop, and a couple of weeks later it had been repaired at no cost. The second was when I was in New Zealand several years ago, and had a problem with the telescoping handle of my primary (and large) suitcase. I contacted Patagonia, and, while the item was purchased in the U.S., they gave me a number of a local man (in Wellington) who picked up the case, repaired it and dropped it off the next day. The charge was ~$30. Remarkably good support.
I am also an Icebreaker merino wool fan. Many of their products are no longer 100% wool, but the quality is still high, and I use their socks and shirts on a very regular basis.
Emile Henry bakeware - yes! And some of their designs can be used stove-top as well. Superb.
Swarovski binoculars. Brilliant in low light, and ergonomically superb. Very expensive, but I used them for many years while working with racehorses. Outstanding customer service, as well.
More recently, I have become a very loyal customer of Kuhl clothes - their pants in particular. Tough as nails, extremely comfortable and practical, reasonably priced, and the best customers service that I have experienced over the past 15 years or so.