I would suggest two models: a local gemma 4 26b variant or a cydonia variant. This one specific custom gemma variant I have been using does a very good job at providing vivid details, while not being overly verbose. I love Deepseek 4 but I can assure you I agree with you 100% in that I don't think it can write "like a human". I've also got some custom versions of GLM4.7 that support very high memory context that run well on consumer hardware and also seem to have very good writing styles. I've also used various GLM 5.1 instances in remote TEEs are also good at writing, world building, etc. There's plenty of other suggestions I'm sure others will give you, such as Qwen variants.
However, model suggestions out of the way:
Writing styles are always going to be tough to get right, regardless of the model.