Expanded Copper Golem Functionality

Due to their small radius, slow movement, and unintelligent sorting algorithm, the copper golem is not very practical to use in game. I propose a way to make them more useful: Let them put items in furnaces. Obviously not everything goes in a furnace, and some things the player might not want to go into furnaces. The golem should only put coal, coal blocks, and charcoal into furnaces for fuel. It should also only put items that always need to be smelted such as raw ore and uncooked food. I know I would find myself using the golem much more often if it was able to do this.