The Entity should appear on the same level as them for Marker for several reason. One reason being that there is already an option to have an entity above an ArmorStand and that is the normal ArmorStand. Another reason is that it would more consistent with the hit-box being on the feet of the ArmorStand. Maybe an option to fix this is have an offset tag with riding like with minecarts holding blocks.
FantomLX
The Entity should appear on the same level as them for Marker for several reason. One reason being that there is already an option to have an entity above an ArmorStand and that is the normal ArmorStand. Another reason is that it would more consistent with the hit-box being on the feet of the ArmorStand. Maybe an option to fix this is have an offset tag with riding like with minecarts holding blocks.