I would probably start by roasting some garlic, running that through a Robot Coup, (food processor) melting cream cheese in a bain marie, thin it with heavy cream, add the roasted garlic to taste, some kosher salt, and some fresh herbs and maybe some white pepper.
Are you sure you want cream cheese? That flavor just sounds funky to me. Do you have issues with a cheddar’ish cheese?
There is a white cheddar (American process) made by Land O Lakes thats sold under the name “Xtra Melt” it melts and thins out nicely with water, it holds well, and it has a spectacular taste & texture.
We use that for our chili cheese fries, and for a few other things. We get great feedback on the product.