Make a seasoning by mixing together the basil, thyme, parsley, cilantro, salt, pepper, cayenne pepper, and garlic powder in a bowl.
Gently mix together the rice, black beans, celery, olives, and green onions in a large bowl. Season the rice mixture with 1 teaspoon of the seasoning.
Make a dressing by whisking the vinegar and olive oil with the seasoning; allow to rest for 10 minutes. Pour the dressing over the rice mixture; stir to combine.