The first Olivia Maseki Houshokuten e Youkoso novel has some believability issues at the beginning and a somewhat rushed pace, yet still ends up decently entertaining overall. It resembles the Oukyuu Majutsushi toshite Hirowareru series a bit in setup with the core difference being that the protagonist here is ‘merely’ highly skilled instead of monstrously overpowered.
From the same author as Monster no Niku o Kutteitara Oui ni Tsuita Ken, Dare ga Yuusha o Koroshita ka is a completely different beast. Rather than focusing on the hero’s journey it instead focuses on the events leading up to it and the events after it, told from multiple different perspectives. A perfectly self-contained story that turned out to be remarkably well-made all around.