Well it depends what we are looking for.
If we want a big lug who is strong, then yeah, Sakho makes sense.
If we are looking for another sweeper to fill the gap where Rafa was and Chyggy failed to fill, then Moreno makes much more sense.
I mean Moreno ain't tall but he's slightly taller than Puyol and slightly shorter than Marquez, so he falls in the average category.
But yeah, if you want a big athletic guy who runs around a lot, Moreno isn't really a logical choice. I hate comparing stoppers and sweepers unless they are some sort of Pique-esque all rounder, which doesn't either describe my Mexican sweeper fetish or your big, athletic African fetish.
For a big dude I'd much rather bring back Botía.