Cheesy Ham and Potato Chowder

Name: Cheesy Ham and Potato Chowder
Ingredients: 2 cups cooked ham, diced into small cubes (I used left over ham roast, ham steak works too); 6 slices bacon, cooked and crumbled; 5 1/2 Tbsp butter, divided; 1 medium yellow onion, diced (1 1/2 cups); 2 carrots, peeled and diced (3/4 cup); 2 celery stalks, diced (3/4 cup); 2 (14.5 oz) cans low-sodium chicken broth; 5 medium red potatoes (1 3/4 lb), diced into 3/4-inch cubes; 3/4 tsp dried oregano; 1/4 tsp dried thyme; 1 bay leaf; Salt and freshly ground black pepper, to taste; 1 1/2 cups fresh corn kernels (or frozen); 1/4 cup + 2 Tbsp all-purpose flour; 3 cups milk; 1/2 cup sour cream or heavy cream (I’ve tried and like both versions)