An example illustrating the typographic possibilities resulting from mixing and combining fonts from the FF Good, FF More, FF Meta and FF Meta Serif typeface families (all fonts from FSI FontShop International GmbH).
Even though both families by Łukasz Dziedzic (FF Good and FF More) seem to be a natural sans+serif pair, and so it does seem for both Erik Spiekermann’s faces (FF Meta and FF Meta Serif, the latter with Christian Schwartz), I think that the faces can be just as well mixed across those pairs. FF Meta Serif seems a good companion for FF Good, and FF More is a good companion for FF Meta.