For least amount of effort you're probably looking at something like the Edgestar BR2000.
It's just like the Edgestar KC2000 Kegerator, holes all pre-drilled with plugs if you want to use it as just a fridge. It comes with none of the hardware of the Kegerator so you pick your own taps and hoses etc. It's a little pricey though, $300+ new.
I've been looking into making my own kegerator and I haven't found anything else that doesn't require cutting.