I noticed that you hadn't mentioned that you were looking for other "brands" in your initial post, but saw that a couple other guys mentioned different ones so I'll chime in too.
Raven Concealment and Off the Grid holsters have served me very well. Raven has an INSANE wait time though, and OTG will usually crank something out inside a week or two. They're both kydex and look very similar. No thumb breaks anything but the gun is extremely secure. I've used them to carry various pistols over the past couple years and had zero problems. Comp-tac also makes some great concealed stuff.
The only downside to kydex like that is it's not padded like some of the other high end holsters (if you're looking for iwb) and kydex can occasionally mar your gun up.
Good luck finding something you like!