Okay, I tortured AI for an hour, searching for fantasy/sci-fi/honghuang/cosmic horror/etc. online novels with unselfish self-sacrificing not showing off not real life religion martyrs with a greater goal in mind with various flavours, and the top picks from AI are:
Lord of the mysteries and Seeking the demon. I'll flip a coin on it.
Lord of the mysteries and Seeking the demon. I'll flip a coin on it.