I bet that by doing simple chord progressions will in no way help you to compose something original. Just the combinations have been already been played.
And also depends what are your goals, if you want just to sell millions of albums and to show your ass off on the MTV or whatever awards you can play an A C D G song, maybe shift two of the chords for the chorus but that is not obligatory, especially if your name is Lenny Kravitz. ANd look cute, have a crazy hairstyle.
With other words you do not need to be creative in order to be famous.