A few more ideas:

Coal generator Uses coal to make energy, smaller as a boiler, but less efficient.

Magmatic Generator Uses Magma/Lava pumped from the ground to produce energy.

Ha Xisuma, didnt know you were active on this forum.

As your Idea goes.
First off, I think it would be a heck of a lot work for the makers, and some people might find them ''irritatin', like the villagers from minecraft.
However, as a gamemode, or a addition to a map, I would support it!