Black uses her through his reprints though, a loophole exists in those regards. Keep in mind, that since it is trademarks, there's nothing really preventing use of Phantom Lady IN the story other than over-zealous lawyers.
Others: Super Ann I, Magician from Mars, Blue Lady (those 3 from Centaur), Black Angel, Amazona, Golden Girl, Madame Strange, Magga, Will o'the Wisp, Kitty Kelly, Yankee Girl, Wondergirl (Brad Spencer Wonderman's partner who sometimes put on an identical costume).
Quality's Wildfire, USA, Miss America (again, trademark issues).