So as to hide spoilers from others who might find this comment, I got about halfway through this list of story critical bosses.
https://screenrant.com/elden-ring-non-optional-bosses-story-main-quest/
I’ve dumped about 100 hours in across different characters including a bunch of co op with a friend who got a bit further than me but also didn’t finish it.
I get super distracted doing the side missions and dungeons, and sometimes I just like to put on a podcast and grind against the combat. It’s my favorite From game, probably. Would love to see them do another Bloodborne at this scope. I’d say that’s impossible but I also never thought we’d get another Armored Core, and yet the new one is out soon!