Whole san marzano tomatoes (D.O.P.) Fresh spices etc..
That's my favorite, too.
But, this is a tough question to answer. Everyone is going to have their own answer, and most of them will be good. No sugar!
M make mine with fresh herbs when they are growing in my garden. Other people swear by dried herbs.
Bottom line, the sauce is just one element of a good pizza, and people can't even agree on what makes a good pizza.
I just know what I like, which includes San Marzano tomatoes, fresh herbs, and lots of garlic.
CD