FFVII -
3. Main Theme
2. Reunion
1. On That day 5 years ago

Chrono Trigger-

3. Chrono Trigger
2. 1000 AD
1. Secret Of The Forest

FFX

3. Scorching Desert
2. The Silence BeforeThe Storm
1. Fantasy

I dont need to explain, you lot should know these OST's are the best.