The long-term direction of SAP solutions is to utilize BP object. You can see it being used everywhere in newer releases and products. So, my first recommendation would be not to try to avoid BP but rather to embrace it (with its difficulties and challenges) and learn how to deal with it.
Having said that, creating a vendor without a BP in a co-deployed system is not possible. You have to create both objects. When you implement a hub, then, yes, you can send only vendors to your target system using IDOC CREMAS and ADRMAS. You will need to treat it just like any regular ALE interface.