chicken stew with black beans and corn

2&1/4-2&1/2 lb. chicken legs,
1 lb. black beans,
3 ears fresh corn,
1 T. dried thyme leaves,
1 T. dried thyme,
1 bunch fresh oregano,
4 bay leaf,
1 lb. onion,
7-8 oz. carrots,
6 oz. celery,
5-9 oz. green pepper,
salt and pepper, finish with cilantro, scallions and grated cheese when serving