My five least favorites:

1. Urzala Dudziak. This must be a joke right? Worse than Yoko Ono
2. Yoko Ono. thanks goodness for Urzala
3. Yvonne Eliman. one crappy disco hit took this lady nowhere
4. Polly Jean Harvey. Maybe she can write, but I still don't get her singing
5. Madleen Kane, hmmm, tough one here, she's got that euro-trash/disco/decadent look thing going on, but her whisper of a voice doesn't quite do it for me.