1. Tigers are among the lesser used animals. Incineroar comes to mind, but he looks more like WWE wrestler than a tiger !
2. Rhinoceros should also be considered. Rhyhorn lines comes to mind, but that's gen-I/IV thing.....
3. Camel 🐫 🐪. They have two varieties so Toxtricity like idea can be considered as well.
4. Peacock 🦚. Ho-Oh is related sometimes, and Quaquaval resembles a bit, but not good as it is based around duck.
Lizards, Reptiles, dogs, cats are very common, so they should be avoided I feel. Cockroach is only represented by Pheromosa.