Change material through optimetrics?

I have a series of materials I want to test for a solid in my simulation. What's the easiest way to iterate through the materials, such that I can natively view field mappings as animations with changing materials?

I could create new designs with each material, but the generation of animations becomes much more complex.

I'm running version 18

Thanks

To elaborate slightly, the materials each have frequency-dependent permittivity and loss tangent that is currently imported as a data table.

I did explore resolving those down to functions that were based on a single parameter that could be stepped, but accuracy was a problem