Well, we don't have base stats yet, but in particular...
If Komala turns out with a good final evolution it could prove a good status absorber, only being affected by the rare sleep status.
Skateout could turn Gumshoos into a pretty ok wallbreaker, but pure normal STAB is kind of limiting.
Bruxish with Dazzling negating priority seems very intruding. Starmie / Slowbro typing too, which is fantastic.
Should Salandit evolve, Corrosion might help out stall, being able to poison even Heatran.
Mudsdale, should it get good recovery, could be a mad tank with its Stamina ability.
Oricorio's dancer ability could provide a very good check to a large number of setup sweepers. Swords Dance, Dragon Dance, and even Quiver Dance users :O