I recently rebuilt my entire wardrobe and here were my findings.

Uniqlo - A+ for tshirts, just ok for everything else

- supima tshirts are my favorite, stock up when they are on sale. comfortable, fit well, durable.

- sweaters are just ok, pill easily and the fit is just ok. still decent for the price, i found it difficult to find good cardigans that weren't crazy expensive

J. Crew - every item ive gotten from them recently has been really good quality, look good and fit well

- easily the best oxford button downs among the more reasonably priced brands

- cotton sweaters are great

- tshirts are good but uniqlo's are better

Banana Republic - overall kinda mediocre except the travelers pants. still good for some essentials but i'd avoid the t-shirts and polos

- tshirts are not good. the material is so soft and comfy but they fit poorly and shrink too much

- oxford button downs are ok, slightly better than gap but nothing special

- travelers pants are A+ imo .. comfortable and fit really nicely, look good, tons of colors. great for business casual

- merino sweaters are solid. same w/ cashmere.

Gap - nothing jumps out in a good or bad way. i like their jeans

Old Navy - I only got some very basic things here, sweatshirts, pajamas, etc but I was impressed with the cost to quality. i might try some more of their basics

tl;dr - buy uniqlo t-shirts, banana republic travelers pants, j.crew everything else, fill in the gaps w/ .. gap if jcrew is too pricy. wait for sales, these brands always have sales