He's a seated figure so not too bad, Mike. At least he doesn't have to stand up, and can lean on the postbox so in fact doesn't even have to sit up (I always find my figures topple slowly backwards over time )
How many does it have to feed? A high enough stack of 8" cakes to be vaguely in proportion would be a lot of cake. Do you have a 6" tin?
Definitely dowels and boards in the middle and under the top one, though.