Possible camera perspectives and graphic styles?

I'm currently wondering what would be possible in module creation concerning graphic style and camera perspective. Are there even different camera perspectives possible, or am I missing something?
- Maps drawn in overhead / top-down perspective with character tokens like in Augury of Chaos
- Maps and character sprites in the camera perspective from KoTC 1 / Ultima VII (oblique projection?)
- Complete overhead/top down perspective with animated sprites as well (like eg. Alien Breed)
- Complete module in Isometric perspective ?