Yuvan shankar raja is one of my favourite composer who has composed music for movies in Tamil, Telugu and Hindi.
Here is a list of some of his under-rated albums that he has composed.
Idam Porul Yaeval
This is an unreleased movie. This is the first movie were the director Seenu Ramasamy and action Vijay sethupathi collaborated with yuvan shankar raja.
Song Pick: Eerakkaathae, Kurunthogai
https://en.wikipedia.org/wiki/Idam_Porul_Yaeval
Nenjam Marapathillai
After long time director Selvaraghavan and Yuvan shankar raja collaborated for this movie. Each song in this album is quirky and it compliments the horror mood of the movie.
Song Pick: Maalai Varum Vennila, En Pondati Oorukku Poita
https://en.wikipedia.org/wiki/Nenjam_Marappathillai_(2021_film)
Moondru Per Moondru Kadhal
This movie has 6 songs. It was the third time director Vasanth and Yuvan shankar raja collaborated.
Song Pick: Mazhai Mazhai, Stop The Paatu
https://en.wikipedia.org/wiki/Moondru_Per_Moondru_Kadal
Azhagai Irukkirai Bayamai Irukkirathu
Yuvan has lent his voice for all the song in this movie. 10 singer have sung the "Kaadhalai Pirippadhu" song.
Song Pick: Kanavae Kalaigirathe, Kaadhalai Pirippadhu
https://en.wikipedia.org/wiki/Azhagai_Irukkirai_Bayamai_Irukkirathu
Taramani
Director Ram and Yuvan shankar raja never missed to produce a great album.
Song Pick: Un Badhil Vendi, Oru Koappai