The Garrison High Goblin riding a lizard is like the Wraithe - begging to be put on a horse. OK, LotR/GM would have Goblins painted green and riding wolves - mine are flesh coloured and I don't see why they shouldn't be on horses.
But then, the figure will also do quite well as a High Elf cavalryman. If I wanted to go commercial I would probably do a bit of carving on the helmet and give it a new shield but for me it's OK as it stands. The Oriental look, of course, means it would stand in well as a Hyborian Khitai. The problem with that is the number needed. Only one figure on the mould because it's not really feasible to make a new mould just for this and a Khitai HoTT army would need quite a few of them. Still, it's a thought. Then again, do I really need anothe all-Rider HoTT army?
Probably, and it's a nice figure.