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Not sure if Wet Blanket Wife covers nagging wives in general. Awful Wedded Life and Like an Old Married Couple have something to do with the overall dynamic.
Right, but I'm looking for one where the wife is horrible without necessarily being part of an Awful Weddded Life scenario (such as if we don't see many scenes of the husband and wife together, or the husband is quite content with being treated in such a way).
Is there a specific trope for the character archetype of the horrible, shrill-voiced harpy of a wife who's usually seen obsessing over the neighbors/celebrity gossip when she's not chewing out her husband? Usually married to a Henpecked Husband, but sometimes the husband is more assertive, though this doesn't stop the wife from continuously berating him.
For example, the narrator's wife in "Word Processor of the Gods", General Alcazar's wife in Tintin, Aunt Petunia in Harry Potter (downplayed in that she's married to a similarly small-minded man, so they're actually relatively happy), several Discworld characters...