I also want to point out that not all the nintendo amiibos work with animal crossing just a select few such as the ones posted here. but definitely all the animal crossing amiibos should be compatible.
from the animal crossing new leaf welcome amiibo card packs. You get the old villagers from the previous AC games which you can invite to the camping grounds or you can also ask them to move into your village.
Stu from past animal crossings
Ketchup is another oldie ac villager
Huck from past ac games
the Sanrio sets from the sanrio card pack
Even playing the new mini games built into the mini new 3DS and wii U you can win their own furniture series from beating certain stages.
Desert Island Escape
Play with your villagers or scan your amiibos, again beating stages will earn you a piece of new furniture series
