Her Fearful Symmetry by Audrey Niffenegger has a character with OCD. I found the portrayal sympathetic and complex but ultimately still a bit problematic. I don't have OCD myself, though, so I may not be the best judge. Your mileage, of course, may vary.
The book itself is quite interesting, although IMO not as good as her first.
Here via access_fandom
The book itself is quite interesting, although IMO not as good as her first.