These first 2 photos are of a rather fine statue at the mountain temple of Konomineji, number 27 on the Shikoku 88.
It is obviously a modern statue and I have no information who did it.
This one at Zenrakuji, temple number 30, is also quite graphic and bold, though it appears his fangs are both pointing down
These final 2 are at Shoryuji, temple 36. All three temples are in Kochi Prefecture.