Are you a different poster to the other ‘investing in good quality clothes’ thread, @zebedeehadapoint? Would be a waste of time for posters to respond to both!
If not - I can think of several good quality Uniqlo brands, but it depends on your budget and lifestyle-appropriate requirements.
Are you looking for ethically produced, hard wearing leisure / casual clothes at high street prices?
Community Clothing
might be ideal. If you want a contemporary, minimalist, ‘professional’ wardrobe have a look at:
Cos
Massimo Dutti
Studio Nicholson
Toteme
Co Collections
MaxMara
according to your budget. If you have more flexibility and don’t need to look ‘corporate’
The Frankie Shop
Loulou Studio
Margaret Howell
Sofie D’Hoore
Lemaire
Teurn Studios
Rendez-vous Store
Bite Studios
all offer wonderul, individual style - depending on your tastes and preferences. Some are the stuff of dreams, others more workaday and practical. Obviously no one is limited to buying at full price online or in stores. Sales, outlet stores (like The Outnet) and pre-owned sites mean you can access excellent quality at whatever price you want to pay.
(Apologies if this is too long and too much. Not bothering with the ‘investment’ aspect - clothes are for wearing now.)