You can use whatever chords you would like. Understanding cadences will help you choose a more sophisticated chord progression. The most popular chords are 1 4 5 & 6, mix them around and test your results. Also take note that for example 3 minor 7 contains the notes of the 5 chord, so it can be used as a substitute for it. Look into extended chords to deepen your understanding of chords and always be asking yourself how is this chord functioning?