Is Thomas Covenant grimdark?
This is a really interesting question. Certainly, these days I would set Covenant aside for the same reasons I set a lot of grimdark aside - I don't want to spend time with this character, doing these things, in this scenario. It's no fun.
Elfy's comments have made me thing on a new tangent about how labels influence publishing decisions - not just in terms of what to market things as, but editorial decisions. I wonder whether Covenant being published today would be edited to more fit the grimdark mold, because that's what publishers think (rightly or wrongly) the market wants. Was it done the way it was to be closer to the high fantasy that was more The Thing at the time? (You cannot argue, given the whole body of his work, that Donaldson was not a grim and dark writer.)
Contrary to above examples, I don't think First Law was that grim. Initial scenes involving Logen Ninefingers had a heroic band vibe to them. Apart from brilliance of Glotka, the first books just barely can be considered Grimdark imo.
For mine, part of Abercrombie's darkness is the cynicism, and the fact that Logen
wants to be better - to stop being the Bloody Nine - but the world keeps cramming him back into violence. (This is even more apparent with Shivers' arc in Best Served Cold, and that's part of why I hate that book. It's magnificently written, and I
hate it, because of what it does to Shivers.)
Honestly, Bender's list just makes me go, "Oh god, WHY read that??" which is often my view on grimdark books so possibly quite accurate!