I hate to be picky, but can a druid wear Dragonhide Plate without taking a feat? They are listed as only being proficient with up to medium armors, so that might not work.
Like so many people, I will advocate a druid. Just remember the first rule of druidness: If it is an abomination against nature, it is less of an abomination when on fire. Or acid. Or lightning. Or sonic.