I'll just jump on the bandwagon and go with Nashville.
I respect that franchise so much, probably more than some of the classic old school ones like Edmonton, Calgary, Montreal, NYR, NYI. It's almost like, because they had to start from scratch (hockey team in Tennessee?), they have worked so hard to build something that many of the storied NHL franchises have lost completely. I despise franchises that treat there fans like shit (Edmonton, Ottawa, Montreal, Isles come to mind), because I guess I've been through it with the Leafs. And you can tell the fans in Nashville appreciate it.
More importantly, I think that as much as people hate Bettman and his expansion agenda, Nashville winning the cup would be massive for growing hockey in the midwest/southwest of America. And as much as us Canadians want it to be "our sport", I believe the more people that like hockey, the better the sport will become. Imagine in 10 - 15 years prospects coming from "non hockey markets" all over the US (like Auston Matthews). You would double your prospect pool in the NHL and the quality of players on the ice would be phenomenal. It would truly become the only North American sport.