I like this one. The 3-quarter sleeve one is the one I have, after letting it hang dry it was long enough. Notice the others are slightly shorter.

Also, Rachel Pally is quite expensive, but she leaves the dresses unhemmed, so I feel like I'm supporting all tall people when I buy one of her maxis. And at 5'11, I have to actually hem them or I'll trip in my 1.5 inch boots.