There are very few clay speciallists in the women's game these days. And basically all of them are second-tier players who don't have a shot at winning GS anyway. Sharapova became a force on clay after years of being the "cow on ice" by her own accounts, RG was Serena's worst slam forever so she was never a clay speciallist to begin with, quite the contrary given mobility was never her strong suit. Simon Halep should be the next Henin but she's finding ways to lose matches Henin never would have.
Myskina was basically a more elegant & leaner version of Kuznetsova. Very accomplished player in the early/mid 00s. People don't remember her much anymore since she retired early with a chronic ankle injury.