We use the Kroger brand
pizza sauce. (either the traditional or pizza parlor styles) It tastes like pizza sauce without adding anything to it, but you can always add a little more oregano or basil or both if you like those spices. Had it last night with some whole wheat boboli crusts and lots of veggies for toppings!

Adding a side salad and some protein is a good idea to create a fully balanced SB meal though.
FWIW, the spaghetti sauces we use all have more grams of sugar than that, but no added sugars either. Since we don't count grams of carbohydrates/sugars, that number is relatively meaningless if the sugars are all coming from SB friendly ingredients. A cup of milk has 15-18 gms of sugar and we should be having 2 cups of that daily in P1 and 2-3 cups of dairy in P2. It's the source of the carbs/sugars and the ingredients that predominate our thinking on SB, not necessarily the nutritional panel, although that provides additional helpful supplementary information as well.