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For nice t-shirts without logo, check Muji (their bio cotton collection) or Uniqlo (their Supima cotton collection). Less than $15, great fit, good enough durability.

A little pricey, but they're merino so can be worn a few times without needing to be washed, and they're amazingly breathable and quick drying.

woolly.clothing

For t-shirts, Banana Republic (although they keep changing the styles and colors slightly over time, which could also be considered a good thing).

For jeans, Levi's.

Haven't really tried too many brands, but those two were good enough for me that I don't feel like I need to make the decision for those two items ever again.