The EAP660 is pretty good. I replaced a few mesh routers with a single EAP660 on a second floor ceiling. I like that they allow you to run a single one without a controller. I'm happy to no longer tie my router to my access point as it was getting to be a bit too much effort to make changes or upgrade before I split their roles. No WRT support, but I don't think that's a concern for just an access point.
The AX series is the current TP-Link offering for most use cases starting at ~$80: https://www.newegg.com/p/pl?N=50012120%20100158096%206013568... In addition, the AX3200 Belkin (RT3200) is $100, and the $140 Linksys (E8450) are both listed as supporting OpenWRT.
