I should say it is and it will be KAMAL from this list.
Vijay, Rajini, Arjun r all predictable heros and they has same style r pattern in acting. They follow the footprints of MGR.... with full of boost up dialogue, 4 songs with heroin, 5 fights and dont forget the punch dialogue

movie over.
But KAMAL ofcourse would have taken ideas from Sivaji's movies. Trying out diff. characters, puting himself under lot of stress for the movie, introducing ppl to different tastes, experimenting, on and on it goes..........
Vikram, Surja, Ajith r struggling hard to come up. If Kamal hasnt shown them the path to explore and if they didnt have the courage they would have been a normal typical boring dull hero. They r also doing gr8!! Hope the Tamil movie would grow better in yrs to come. Offering us much more brilliant movies.