What I mean, is that the bottom half of the sprite is allowed to pass through objects.

I'm looking to have the top half of the sprite to pass through objects (creating the effect of the sprites feet being literally infront of any object in any direction and the top half of him being drawn over top and not colliding).

Let's say the sprite is walking up into a block, it's meant to look as if the top half of the sprites body is towering over the block, due to the angle.

But all you really have to do is to look at any 2D RPG's or even Bomberman itself (not sure about bomberman but I would assume) looks.