Specifically Medieval, Victorian (although you already have a handful of Victorian, which are great), the 20s, the 50s, and then the 60s/70s/80s (cause those three decades are just a whirlwind of style on acid).
I mean there are so many great ideas for those eras! Specifically the 50s however, as there aren’t ANY dresses that end at the skirt length around the knees to calves ratio, it’s all either too short or too long.