Group price (Based on manufacturer or custom product)

My store has quite a lot of products, Although the function of group price is required, But we don’t need all products to have a group price setting.

So all current group price modules, Is it possible to have a group price only for the products I want to set? (Products that do not have a group price set, sold at a default price)

Is there a module that meets our needs?

Your description is pretty vague and looks like you're mixing the terms. Groups in OpenCart are customer groups, so your description doesn't make much sense. Describe it in a different way, providing an example.