I listen to Ghost Data and Porter Robinson lots. Both are electronic music, but I like them more than Zedd or Madeon because they sound more unique.
Ghost Data's chord progressions are unique but repetitive (I don't know many other artists that have a chord progression or vocal idea like that of "Queen of Knives", so it's unique, but the main chord progression of "Queen of Knives" doesn't change all that much throughout the song, so it's repetitive). I like that there's sonic variety while exploring singular ideas fully, like how the main melody of "Thy Flesh Undone" repeats through different instrumentations.
Porter Robinson stuff is pretty great because it sounds more emotional than most EDM I hear. It can sometimes have words, sometimes not. The Worlds album is more of an ambient and emotional/inspiring twist on EDM; specifically I'm thinking of "Goodbye to a World" and "Lionhearted" as uniquely happy songs.
I give an honorary mention to "Antirrhinum" by MALO because its rhythms are pretty cool and confused me a lot at first. It was entertaining trying to figure them out.