Then there's "Nayagan" with Vijay Sethupathi. It was a critical darling and showcased his acting range. The movie dealt with themes of identity and revenge. The performances were stellar, especially from Vijay Sethupathi. This one is more on the serious side, so maybe include it for depth.
Next, "Thuppakki" starring Karthi and Trisha. It was an action movie with some great fight sequences. The soundtrack by Yuvan Shankar Raja helped it become popular. The story had a good mix of politics and action. Should be good for someone looking for action. tamil 2011 movie download
I should also mention some of the themes common in these movies, like social issues, family dramas, and action. Highlighting the technical aspects like music, cinematography, and direction could be important. Maybe note that the reviews are based on critical reception and audience reactions. Then there's "Nayagan" with Vijay Sethupathi
"Baba" starring Dhanush. He played a character named Baba who is a criminal. The movie was well-received for its performances and story, though it had a tragic ending. It was a critical success and won several awards. It was an action movie with some great fight sequences
"Kadamba" by Bala. I think it won a National Film Award. It's a period drama with some intense performances. The story is about a king and his family. The direction and storytelling are unique, which makes it different from the others.
"Nirai" by Sundar C. with Silambarasan. It had a good story involving a man who goes to prison and his family's struggles. The performances were solid, and the music by Bharadwaj added to the emotional depth.