Who is the best Actor specifically?

[NOV]

Ok, thats not the full title. :P

What I am looking for has been done since time immemorial right from the drama days.
Sivaji has done it, MGR has done it. Kamal has done it, Rajini has done it.
Comedians have done it, heroes have done it...

I want to know who you think impersonates a woman best.
Lets discuss the candidates first before we put up the poll.

In the meantime, help in giving some pictorial links.