On the heavier side of things, here are a few suggestions (done in a rush):
Dillinger Escape Plan- Dissociation (this is simultaneously their most eclectic and accomplished album)
The Armed- Only Love
Rolo Tomassi- Time Will Die and Love Will Bury It (epic doesn’t even begin to describe it)
Melt-Banana- Fetch (no heavy, but probably too noisy for most people. But it’s got that amazing Melt-Banana energy married with so many great tunes).
Converge- All We Love We Leave Behind and The Dusk in Us (obviously)
Elder- Reflections of a Floating World (although I haven’t listened to Dead Roots Stirring which is apparently even better).
Daughters- S/T or You Won’t Get What You Want (too early to decide on YWGWYW, but it already feels pretty special).
There are some excellent suggestions on this thread.
A few more, not sure if these were mentioned:
Joanna Newsom: Divers
Pile- Dripping
Blanck Mass- World Eater
But if I have to go for a non-heavy option, it would have to include some Jeff Rosenstock. So:
Bomb the Music Industry!- Vacation
Jeff Rosentock- WORRY. and POST-
If I had to choose one, I’d say WORRY. Just an incredibly enjoyable album I put on all the time but never get tired of.