For sculpture in this style, bas-relief (or low-relief, or just relief) might fit. This refers to sculptures which attempt to show three dimensions but themselves are relatively shallow, such as these Egyptian gentlemen and their ox:
Sculptures in bas-relief often appear in awkward poses in order to show necessary detail, although later use became more sophisticated, especially in things like coinage, which can appear much more three-dimensional.
For painting, profile is certainly descriptive, but even among art historians there seems no other term for this distinctive style which includes the legs, head, arms, and other artifacts symbolically positioned. It seems to be referred to as "Ancient Egyptian" style.
One term you might find useful is hierarchical proportion, meaning that the size of the figures is related to their importance. For example in this "agricultural scenes tomb of Nakht" :
Nakht, an Egyptian official, and his wife are the largest figures, with various agricultural vignettes depicted around them.
So if you write your fantasy art as sculpted murals, then you can use bas-relief. Otherwise, if you really want them to be paintings, then you might have to get creative.