"Original"

I agree with Zubr; among the standard templates for any size, you can find a couple of decent ones (we had some during a flooder tournament, and I can even share them). They might not have been perfectly balanced, but I must say that the type of neutral creatures encountered was always more important in such games than the map's asymmetry or unfamiliar terrain. And the type of neutral creatures doesn't depend on the template. You can, of course, use the templates suggested in the first message, but downloading additional generators is overkill.