I think Krishnidoux has Yoga Jeans, doesn't she?
For US-made, there's Imogene & Willie, BLDWN, and Bluer. I think Agolde is made in LA. Also Reformation, which you mentioned. There are quite a few other small labels that only do men's jeans (I think women's jeans are much trickier in terms of design and sizing). Levi's has a few made-in-the-US options -- maybe just special 501s at this point? Oh, and there's Gamine if you're into the dungarees look. They really just do workwear. Most of these are made with Cone Mills denim, which is also produced in the US.