Years ago someone on BF recommended Original Bag Balm. I tried it, converted and stopped using anything else since. Here is the ingredient list: Petrolatum, Lanolin, Paraffin Wax, Water, 8-Hydroxy Quinoline Sulfate 0.3%
If I ever develop a bacterial problem down there, I'll probably give Drapolene Cream a try. It was developed by GSK for "nappy" rash or urinary dermatitis as an antibacterial. I have used it as a topical for my father's skin after he developed ulcers, and that prevented reinfection after healing with Silvadene.