Patagonia, been buying their clothing for 35+ years. I sent my ageing synchilla jacket back because the zip was faulty, fitted a new one free.
Rohan, again 35+ years, ever since my late dad got me a pair of 'bags' I saw advertised in an American Express magazine.
RM Williams boots, belts and moleskins.
Timberland for their boots and boat shoes. I have a pair of original 6 inch boots that I've had for 20 years or more.
Spoke for their Casual trousers.
Kuhl.
Prada amber pour homme.
Serengeti for their drivers sunglasses, both my wife, children and I swear by these for driving.
Oakley, have a pair of 20 year old 'wires' mainly used for skiing.
Izipizi for everyday reading and sunglasses, excellent value and quality.
Chase gin and vodka made from their own potatoes (field to bottle) about 20miles from me.
Black Mountain Roast coffee, blended in Wales near where I live.
Apple
Had Jeep's for a long time until the last Grand Cherokee, the seats were terribly uncomfortable so no more.
Swanndri for their outdoor clothing and workwear.
Sonos.
Stanley flasks.
Victorinox Swiss Army knife.
Buck 110 knife.
Leatherman tool.
The nature of the work I used to do meant that I either wore overalls or, apart from my Swannies, purchased cheaper clothing for work as I didn't want to trash the good stuff although some of that good stuff eventually became workwear...
I have found that buying quality has disadvantages and advantages - the advantages to me are that, while being costly, quality products don't seem to wear out but the disadvantage seems to be that when companies create new products it is harder to buy new when I already have similar at home.