I make an 8" pizza that is valued at 3 weight watcher points.
First, remember there are considerable carbs in the crust. So, start with a thin crust. Whole wheat crust or one with whole grain will provide more fiber. If you want to increase the fiber, try adding some chia seeds to the dough when you "finger" dock it. As an alternative, use armenian flat bread (delicious) - it is easy and convenient. Top that with a low sodium tomato sauce made from low sodium tomato puree. (You can do this yourself). Include some fresh basil in the sauce along with some fresh garlic, oregano, and thyme. Add a little cayenne for heat. This will have some fiber, but not much but does have some lycopene which provides some antioxidant protection.
Slice some fresh mozzarella balls on top of the sauce. If you are watching fat grams, pay attention to the amount of cheese you use. Add some fresh tomato slices, a sprinkle of sliced mushroom and tear some fresh basil on top. Bake on a quarry tile or pizza stone to get the crust crisp.