I think I know where you're coming from - that French guy Vouillard(sp?) right? There is definitely an 'over-stuffed sausage' look that the shorter guys can end up with if they follow the current trend of heavy x, y and z substances.
But I think back to Benaziza, Pastel, etc. and I do believe it's possible to pack on some mass without starting to look like a tardigrade... I know very little about the smaller guys competing today, but this one (Clarida) looks reasonable, no? (He's probably really well known but I don't know him from Adam)

There must be others - maybe we could turn this into a thread celebrating BB's who are a foot shorter than ourselves LOL joke lets not bother....