Mrs Bennet is always making trouble, for example embarrassing Elizabeth in chapter 9 and chapter 18 (and we now can say that her behaviour was part of what led Darcy to act to separate Jane and Bingley).

Mr Collins also causes a fair bit of disruption:
Mr. Collins was at leisure to look around him and admire, and he was so much struck with the size and furniture of the apartment, that he declared he might almost have supposed himself in the small summer breakfast-parlour at Rosings; a comparison that did not at first convey much gratification;... (chpt 16).

Nor does Lady Catherine strike me as a witty conversationalist but she brings trouble:
Now and then they were honoured with a call from her ladyship, and nothing escaped her observation that was passing in the room during these visits. She examined into their employments, looked at their work, and advised them to do it differently; found fault with the arrangement of the furniture, or detected the housemaid in negligence; and if she accepted any refreshment, seemed to do it only for the sake of finding out that Mrs. Collins's joints of meat were too large for her family. (chpt 30).