At one job we had some people hired who, from the stories I'm reading here, wouldn't have been good "culture fits" at a lot of companies. They were older (50+). Didn't hang out after work. Came from a different background (cellphones).
Instead, one brought us much improved coding standards that greatly accelerated our development process (by greatly reducing our debugging time). The other was just ludicrously efficient as a programmer and knew the ins and outs of embedded like no one else and single-handedly rewrote one of our major projects (which the bosses had been toying with hiring a consultant to do).
But they weren't like the rest of us. Single, 20-something, male (not universally white, we had a decent mix there). They didn't hang out with us on Saturday night. They didn't go to lunch with us. They didn't game with us when we had random game nights.
But as professionals, they brought expertise and experience and mentorship that we desperately needed.