Bharathiraja

He has introduced many actors as new faces notable among them are 

1. Karthik, 
2. Radha, 
3. Revathi, 
4. Raadhika, and 
5. Vijayashanti.

 Apart from lead actors, he has introduced a bunch of supporting actors. Notable among them include 

1. Janagaraj, 
2. Vadivukkarasi, 
3. Chandrasekhar, 
4. Pandiyan, and 
5. Napoleon

https://www.google.com/search?q=Bharathiraja

Many present day directors who were unknown to people turned into actors after playing a debut petty role in his films: 

1. K. Bhagyaraj, 
2. Manivannan, 
3. Manobala, 
4. Thiagarajan, and 
5. Ponvannan are among them.

https://t1mi.blogspot.com/search/label/Bhagyaraj