Tabu or Rani or Vidya.Who is the better actress?

All are great I prefer Vidya

I haven't seen anything of Kangana except Gangster and Woh Lamhe, so excluding her.

Rani is more versatile. But Vidya at her best trumps over Rani at her best. Kahaani and TDP trumps anything Rani has done. But I can't imagine Vidya doing a Hum Tum or BNB.

Rani is the most versatile out of the three. She can do any role. So I voted for her 

Rani definitely is the most versatile but Tabu blows the other 2 out of the water based on sheer force of talent and I would say, even on screen magnetism. Her screen presence is so intense, you just can't look away. 

Vidya is excellent too but she loses out, given that she can only do certain kinds of roles.

I would say, it's Tabu > Rani > Vidya (who is pretty brilliant herself!)

Alia is the most versatile actress in bollywood history 

Tabu is in a different league and levels above the other two.I had written it ages ago and still maintain it she is the best actress in hindi cinema for the last three decades.

Tabu anyday! She can do serious roles as well as comedy, the only thing she is not good at is dancing but she has created her own niche. Vidya did as well but she was bad in romantic comedies. Rani is good but she has not been a consistent performer, she falters in some movies i.e. Dil Bole Hadippa, Sawaariya, Hello Brother, Ta Ra Rum Pum etc. Rani only gets roles in her own home production now. 

Tabu > Rani > Vidya 

could you kindly add Rekha in the list as well...please .

All three are good when it comes to serious roles but they are not as good when it is about comedy.