What are some good diorams for a King tiger?

Even thought there were very few, there around 100 tigers (King Tigers among them were involved in the Ardennes offensive(Battle of the Bulge)) I always find snow dioramas the most interesting to do, I would suggest you do a winter diorama from the Ardennes Offensive
I hope this has given you some inspiration

yeah but i need some ideas to get me started

Thats the fun part, its really up to you to decide. Or just catch a history moment with the tank in a photo.