Duang Jai Nai Fai Nhao

Romance part apart, male leads in both these dramas are financial wizards and offer solutions to various financial problems faced by the society throughout the drama.

I haven't watched Duang Jai Nai Fai Nhao but based on the synopsis, they have a few similarities. Both male leads want to take revenge on their family. Both male leads are rich (in Hua Jai Sila, he became rich by his own means). Both female leads want to stop the male lead from taking revenge. Both male leads use woman as a means to getting closer to seeking revenge.