The purpose of "stereo" is to create a holographic image. (Otherwise, mono would do just fine.) So if your left and right fronts are set up properly, they will be creating a centrally located image if that is what was recorded. There would be no need for a centre because the stereo effect would be producing an image in between the fronts. Of course you have to be sitting in the sweet spot and you must not be using a discrete mutichannel source.
Also, if you have good full range fronts, you do not need a subwoofer.
Also, if you have good full range fronts, you do not need a subwoofer.