I’d put some sconces on the tall wall.

That is a better suggestion than my rope lighting. Of course, It’d require a licensed electrician to do… looks suspiciously

If you need a fan there for airflow, there are good low-profile options out there.

Another excellent suggestion, but this:

Ideally I’d do away with it altogether, though, and see about possibly adding a mini-split if it’s too uncomfortable in the summer/winter.

is the best idea. There are some really nice, attractive in-wall options that would do a better job than a ceiling fan, with more versatility.

floor cushions and a low coffee table might be nice there by the window instead of the hobo batchelor setup

This is the best idea of all. Full carpet, low chairs or beanbags, and a really low coffee table; this would be a completely different room!