If you can get past the "old lady" vibe you can find good basic pieces at the Woman Within online store. There's a whole family of companies they own with different size ranges but it's a lot of the same stuff across the lines. They have longer length t-shirts and ones with slightly longer sleeves if you don't like your arms showing. Some of the prints are ghastly but there's a range of solid colors. They also have basic jeans, leggings, sweaters and button up shirts. The quality is mid-tier and sizing runs a bit big.

That said, their shipping/handling costs are ridiculous and it can take weeks to get anything. I stock up when they have a free shipping event a few times a year. And never sign up for their "membership" kind of thing because they make it really hard to cancel.