Do we still consider Chanda Rubin 'active'?
For me, she's definitely a better player than Elena Dementieva, who's the obvious choice. Nicole Vaidisova needs time to develop. She's not yet proved herself worthy. Nadia Petrova needs to beat either Kim, Justine, Amelie or Maria in the latter stages of a slam to deserve the unwanted mantle.
Chanda Rubin, then. Petrova otherwise.