Cut salami, pepperoni, havarti, and Cheddar into 1/4- to 1/2-inch thick slices, and then cut the slices into smaller bite size pieces, about 1/2 inch in size.
Add meats and cheeses to a large bowl and add red peppers, olives, with marinade, pickles and parsley and toss to combine.
Add red wine vinegar, balsamic vinegar, garlic, salt, and pepper to a small bowl and whisk in olive oil until combined. Pour mixture over meat and cheese mixture and toss well to coat.
Allow mixture to marinate in the fridge for at least 4 hours and up to 5 days.