Hey:) you should check out the band "The last ten seconds of life" The song "Pain is Pleasure". the albums "Soulless hymns" and "Envivo" are packed with gnarly lower tempo deathcore:) Amazing vocalist.
Hey man. If you want great melodic proggy metal, you need check Surroundings - Hymn of a False King. Its very underrated band from Australia. I think you loved that