Ah! At last.

Added the Lich King helm from the Lich King cinematic model with the help of Reterasmodelstudio. Uses the Arthas Unmounted Model by Holyravioli and thanks to Z1003, the model got lip syncs.

How to import the model:
Just import the mdx model normally but remove war3mapImported\ from the dds file. It should look like this:

war3mapImported\TheLichKing.mdx
undead_arthasevil_main_diffuse.dds

Don't forget to give credit if you use it!

Stay safe babes

EDIT: Edited the parent node connection so now all animations should look good!
If you want an even better version, check out Z1003's Lich King Reforged