I am very interested too. Sounds like fun would be glad to help. Have done around 20 fantasy maps for another project, think the task will be no problem. I can adapt many styles. 3 and 4 are no problem.
Hi! I currently don't have any samples other than this sketch I did a while back but I'm pretty sure I can imitate the style in example 3 and 4. You can contact me on discord if you're interested. (dmnc#3593)