I've been very happy with my ADTH NextGen TV box that connects to my TV using an HDMI cable. It receives OTA signals and gives you the choice of watching ATSC 1.0 or 3.0 broadcasts. The cost isn't bad either. Their customer support has been very good also.
ADTH has been a leading supplier of broadcast television equipment and an innovator of ground-breaking telecommunication systems for IPTV and other media-related applications since 1993.