Those look great! You could do a lot of things - make a dragon tombstone for a dead wizard, suspend flaming bowls or flickering votive candle holders from their claws, use them as sentries on pillars or walls, perch them on a round Styrofoam ball, attach that to a long pvc pipe and make tall posts for an entryway with a chain reaching across both poles, perch them on either side of a basin and make a kind-of dragon water feature, if you wanted you could spray paint them with that fleck-stone type of spray paint to make them look like stone & then they'd be really cool for a cemetery.
Anyway, lots of options! Hope you can find a neat way to incorporate them into your haunt!