In a small bowl, whisk together vinegar, oregano, sugar, garlic powder, onion powder, Worcestershire, celery salt, and crushed red pepper; let stand for 10 minutes. Whisk in oil in a slow, steady stream until well blended.
In a large bowl, combine vinaigrette, pasta, cheeses, salami, sausage, celery, red pepper, olives, pepperoncini, parsley, salt, and black pepper; toss well. Garnish with pepperoncini, if desired. Refrigerate for up to 1 week.
