Interesting discussion. I haven't put in my two cents for a while on this thread but I thought maybe I could help.
In OU, Pangoro doesn't have too much of a niche. Scarf is the only viable option. It can come in on some common mons like Espeon, Tyranitar, Gengar, Jirachi, Hydreigon, Heatran, and others to scare them with his stabs. The first few he can switch in on, most others he would have to revenge or get a volt switch from Forretress or whatever. Pangoro's best trait (besides having good attack and stab typing) is parting shot. With a scarf and the ability to scare off those threats, you can partshot the opponents counter and gain momentum in the battle, possibly allowing your mega Garchomp to setup. With prediction, he can scare off and ok some top threats and gain momentum for your team.
In OM's, Pangoro does pretty well. I've used him to great effect I averagemons and want to try one in tier shift or inverse battle.
In tiers below OU, we can't be sure what mons will end up where, but I see a bright future for our bodyguard bear. Many lesser psychics, darks, ghosts, normals, rocks, ices, and steels are sure to end up where he is that he can setup on or destroy. Pangy can try other sets like choice band, bulk up, swords dance and more!
Or I'm just optimistic because his design is cooler than scrafty's..