Ultima Online: Third Dawn
Even the original Ultima Online client uses a height map for terrain and three dimensions for item and character location within the world, but the newer "3D Client" introduced with Third Dawn included 3D models for all creatures. It still, however, maintains use of 2D artwork for objects. While it has an option to zoom in, it does not allow for any rotation due to the 2D artwork still incorporated, and the way the map is constructed. Some of the 2D artwork (especially walls and trees) were improved noticeably.