Titan IV was slightly louder than the shuttle, but yes both paled in comparison to the Saturn V.
However, I think it safe to say a rocket will beat a jet for sound every time unless it's a model rocket.
Still, even louder than the Harrier and a B-1B was the damned DC-8. That thing had 60s era jet engines on it which, interesting fact, did not combust fuel to create thrust, but rather were disguised speakers designed to shriek at 200db and propel the plane through the air on the pressure of the sound waves alone. These speakers worked so hard black smoke came out the rear.
Nothing worse than being under the pattern of THAT demon, which came in and out twice a week.