Good and alternative vocaloid Producers????

I'm asking for recommendations of your favorite vocaloid producers, BUT, especially those who you tihnk are different or unique in a way, like you see how vocaloid is generally linked to either this kawaii anime aesthetic, or an idol-ish teenager aesthetic. I want to hear your fav producers that are separate from that. Something like utsu-p that is more metal-like, or Paseri Onuma who's really edgy, etc.