https://civitai.com/models/529886/thick-lines-or-pony-and-illustrious

This model works best between 0.8~1.0

Necessary Trigger Word: thick outline,

It was also trained on these tags: black outline, white outline,

Other tags that can help: thick lineart,

Place either 'black outline' or 'white outline' in the negatives if you want the other type specifically. These tags can be amplified for a even more drastic effect.