a great start.
i think vfront and back are looking good but you need to move the shoulders and biceps to create more movement.
you could also try moving the head from left to right a little and twisting the whole upper body a tad iof u want to give him a more intimidating, animal like movement.
the tail is begging to be animated but i say dont overdo it, just keep it to a subtle flick from left to right.
i feel like you should make some major edit to the side view, he is standing too upright like a human when he should be hunched over more due to his physique.
the legs are also too human, and in a better stance i dont think he should be dragging his tail on the floor.
remember this is a creature just at home with running on all fours as it is walking on 2 legs.


here is a more upright stance but he is stationary, i feel this artist would have him hunched over too if he was walking.

keen to see more!