Don't think there's so many. Now...if you're talking Paul's teachings...yes there are plenty of mainline Protestants who deny those. But plenty of Catholics do too.
Catholics read from the Old Testament, the Gospels and the epistles at EVERY MASS, traditional Anglicans and Lutherans typically do the same; however, the Bible Christians just let their preacher pick something to read and talk about and more often then not this is from Saint Paul and not the Gospels.