When creating a full Chibi Kingdom Death set, I found that a number of the larger Kingdom Death monsters already had large heads (or head like areas). In some cases, no actual modifications were needed to turn them into Chibi Kingdom Death creatures.
When I'm creating chibi characters, I tend towards some of the more official color schemes. It helps the characters to be recognizable. However, with the unmodified monsters, it makes more sense to approach them with a brighter pallet (and go for chibi eyes).
So, here is my Gorm- in strong purples. I painted the eyes similar to the way that I paint Chibi Zombie eyes. I also decided that the head stalk wasn't a great spot for a light source unless I wanted the mini to be mostly in darkness, so I opted for a second eye instead.
Here he is- all ready to dismember cute little survivors.