Shayera (Hawkworld) Thal was/is my favorite Hawkwoman. I'm also holding out for a return under Lemire's pen in the pages of JLU, but am trying not to get my hopes too high.
RE: "Zero Hour" - it may have ultimately sealed Katar's fate, but I really loved what Messner-Loebs did with the Hawks (especially Shayera!) at the time it was happening.