My go-to is Bullard Leather. Moderate pricing but extremely high quality. A variety of leather colors & styles.
I usually get their Bodyguard model with the leather flap protecting the body from the hammer spur. A lot of brands don't offer this, which is crazy, IMO. I also opt for a lined holster, which is gentler on a blued finish.
Bullard is just a first-class shop, IMO.