For tall guys, Gap is one of the few places you can buy 36" leg trousers and jeans. I wouldn't consider buying them anywhere else and the quality is pretty good too. I wonder if they even realise they almost have a monopoly on that.
I get nearly all my jeans from Next, they are the only retailer I trust to be consistent in their sizing across styles, makes buying from them online much easier. Other retailers could learn a lot I'm that area alone.
I'm 1.70m tall and living in the Netherlands with exactly the opposite problem. Most pants and other clothes are for taller men. I used to buy my clothes in River Island which had a good fit, but they closed the store last year. Buying men's clothes outside the norm is a pain.
but what about 'long torso' tall folk? I'm yet to ever find a good place for that - beside bespoke clothes (which just feels weird to order a v-neck from)
Not sure how present they are in the UK but Express has tops available in ‘Tall’ which is essentially long torso sizing if you buy in slim or extra slim trims.