Everything is in the title. Looking for one person - it is probably illusory to hope to have more than two log at the same hours for this - to play in this fashion.
For those of you who might be interested, but don't know the word "roguelite", it means that death is permanent.
Without a guild to help me, and playing random dungeons, which can't possibly be named "quality playing", I did every single normal dungeon except the two very last ones before finally succumbing - and rolling another toon

It's definitely possible to do something, and a good tank/healer combo used to play together could probably beat veteran dungeons too.
This is a very rewarding way to play once you get past your first few heart crushes on deleting a good toon.
The adrenalin is way, way better than playing stupidly, wiping, repeat until lucky.