What would you say is the very best natural cure for a stomach ulcer?

Depends: If you know the cause of the ulcer, you may be able to cure it naturally. Ulcers commonly heal by stopping drugs like Motrin or Aspirin which created the problem. Same for alcohol or nicotine, which you can choose to avoid. Healing from stress ulcer or a heart attack may be more difficult without guidance from your physician. There are safe medications to speed the process, choose carefully.