I got Lickitung from doing Field Research. Also got a Eevee from that which gave me enough candies to evolve it into Umbreon.
Also I finally caught enough regular Meowths to be able to evolve my Alolan Meowth into Alolan Persian. I think I only hatched two Alolan Meowths from those eggs.
I keep getting Alolan Sandshrews and Rattatas lately. I got enough Alolan Sandshrew to be able to evolve it twice so far. Still haven't got a Alolan Vulpix yet.
I wouldn't be surprised if I catch one of the Gen 4 pokemon or hatch one from a egg before I hatch an Alolan Vulpix.