The lands end ones are actually still made with really nice heavy cotton, so wear and wash well.
I think this is the tank top I have:
https://www.landsend.com/products/womens-cotton-tank-top/id_251785?attributes=44967,5923&source=GS¤cy=USD&geo=US&skumv=6152922&promotion-code=SHORE&promotion-pin=0&utm_source=google&utm_medium=cpc&utm_campaign=%23PLA%2F_(1)_GGL_(2)_US_(7)_DES_(9)_BC%7C&cm_mmc=139971612&SC=pla_non-brand&CMPGN=20131727717&ADGRP=152551376575&KYW=&MT=&DV=c&PID=6152922&TRGT=aud-455994686543:pla-295613137380&CH=Google%20AdWords&gad_source=1&_cclid=Google_CjwKCAjwzN-vBhAkEiwAYiO7oErMTog7lAGPiijEea_TrVc80dcTvX9whLvwHqWVZygQ-zI26BAoIBoCB9wQAvD_BwE&gclid=CjwKCAjwzN-vBhAkEiwAYiO7oErMTog7lAGPiijEea_TrVc80dcTvX9whLvwHqWVZygQ-zI26BAoIBoCB9wQAvD_BwE
I think I also have their v-neck tee or scoop neck tee.
I also like this j crew one that I have in a couple colors if you want a fitted one and if you don't have fat upper arms (they are very tight nad have a longer upper arm):
https://www.jcrew.com/m/womens/categories/clothing/t-shirts-and-tank-tops/short-sleeve/slim-perfect-fit-t-shirt/MP367?display=standard&fit=Classic&color_name=ripe-raspberry&colorProductCode=BF355
The kirkland t-shirts are also surprisngly well made -- I have the v-neck which I wear a lot under a blazer with jeans a lot, but it looks like now they only have scoop neck ones:
https://www.costco.com/kirkland-signature-ladies'-scoop-neck-pima-tee%2c-2-pack.product.4000149676.html
I also have the Boden scoop neck that I really like.
I can't deal with the cropped tees that are in lately, so these are all ones that have a longer length to them.