I was actually doing this till I picked up a classics Orko from big lots. don't know if I took any pictures when I still had him, I might have one in MOTUC picture thread. A basic surmise, it puts Orko as a bit taller over all but the kind of problem is the way the 200x line had the figures almost looking down.
Here found the shot
MOTUC colection part two by ~wyldman11 on deviantART Some other stuff in there, now that shelf is full of MOTUC figures.