There are several that I think are portrayed rather well, such as horses and elephants, and some that I just like to see that aren't depicted too often, such as crocodiles. But I have to agree with you that the lion is probably the best pose so far. This is probably die to it's proliferation on banknotes due to it's link with the ruling class. They are not only wild animals, but on the crests, emblems, etc. of many countries. Some of my favorites that I have include:
Ethiopia
French West Africa
Sweden
There are many more that have lions on them, but these are some of my favorites in my collection. There are many different types of stylized lions out there as well, and some of those are also quite striking.