We can suggest some classic Thai movies that might interest you:
The Overture (Hom rong): This movie is based on the life of a traditional Thai musician who struggles to revive an ancient form of music.
Tears of the Black Tiger (Fah talai jone): A quirky romantic movie set in the 1950s, about a gangster who falls in love with a country girl.
Iron Ladies (Satreelex): A comedy movie about a group of male volleyball players who transform themselves into a women's team and go on to become national champions.
Tom-Yum-Goong (The Protector): A martial arts movie about a man who travels to Australia to rescue his stolen elephant.
Bang Rajan: An epic historical drama about the defense of a Thai village against the Burmese invasion.
These are just a few examples, there are many more Thai classic movies worth watching.