Would simply a bus-sized dragon work? Since, you know, if everyone else is the size of a large house, or very much larger, then a bus-sized dragon could just crawl over them with ease. Perhaps a dragon that's less mythical dragon, and more of a lizard? A unique dragon, where there isn't as much heavy scales, which frees of range and speed of movement? Perhaps when dragon essence mixed with the human soul, a bit of a mess-up occured where part of the human essence mixed with the unintegrated essence of the dragon, which led to a less-dragon-y dragon shifter?

And dragons are all I really have interest in. Or a half-man half-dragon, which would certainly be unique in the roleplay.