“Which toothpaste is the best for getting whiter teeth?”

Any whitening toothpaste is going to do about the same thing as any other TP, because the amount of whitening that occurs with just using TP is minimal. If you want to have a noticeable whitening effect, you should consider Whitestrips or other tooth-whitening products that allow the whitening material to be in contact with your teeth for long enough periods of time to work effectively. TP just doesn't do much.