There are thousands of environments with poses. And a "good" environment is very subjective: you can have nature, medieval, sci-fi, contemporary, studio. etc
Maybe you can start by having a look at DM assets. They are generally modular with presets for several scenes and always include poses and lighting, and both the scenes and the poses are very good. Mostly contemporary, but some are historical, sci-fi, goth, etc. And many are present here.
https://www.renderosity.com/rr/mod/bcs/vendor/DM