1. Kamala Hassan is the Best Tamil Actor Tamil Film Industry Has ever seen next to Sivaji Ganesan.
Kamala Hassan Has done a great many roles.
He chooses his films and roles with great care.
Kamal Haasan’s first as a lead actor came with his role in the 1975 drama Apoorva Raagangal.
He has done a great job in Nayagan , Vasool Raja MBBS , Alavandhan , Sagaar , Thevar Magan , Indian , Guna.
Anbe Sivam is one that touches me a lot.
He did ten roles in Dasavathaaram
His recent film is Unnaipol Oruvan.
For the awards and recognistions that he has won you can refer to http://en.wikipedia.org/wiki/List_of_Kamal_Haasan’s_awards,_honours_and_recognitions
You can go on telling more and more about
2. Next one is RajiniKant who has fans all over the world.
His films were been put up in may theaters and screen all over the world.He was paid Rs. 26 crores for Sivaji: The Boss, making him the highest paid actor in Asia after Jackie Chan.
He has acted in more than 150 films.
The last three poistions has a tight competitions between Ajith , Surya , Vijay and Vikram.
3. Vijay has a hell a lot of fans and his films provide a good entertainment.
4. Vikram usually goes for a role that is inspiring and he is rightly called youth icon.
5. Ajith too has more fans than Vijay.He won two consecutive Filmfare Best Actor Awards in Tamil in the film Citizen and for his dual roles in Villain.He became popular after his dual role in Valli.
6. Surya has done good roles in many films that has marked his presence in Tamil Film Industry. His Films Vaaranam Aiyiram Ghajini , Aayutha Ezuthu Nanda , paerazaghan , pithamagan were super hit.