yes yes i can (btw im assuming by darker you mean kind of morally ambiguous??)
- vicious by v e schwab (urgh this book killed me)
- the young elites by marie lu (so much love for adelina tbqh)
- half bad by sally green (lots of blood guts and gore in this one btw)
- the gods of gotham by lyndsay faye (not so much the protagonist but his brother)
- the secret history by donna tartt (full of pretentious morally ambiguous dickheads tbh)
- the demon’s lexicon by sarah rees brennan (one of the main characters has no morals whatsoever for spoilery reasons i cant tell you)
thats all ive got rn i hope its enough :)