I've had okay results. My solution - I realized there was a 70s era "roof" antenna in my garage's attic already mounted. It can be powered... but I don't trust plugging it in, so it's unpowered right now. The coax cable (cox installed it - but I use Verizon for internet) ran right by it... so I just pulled the cable up, and screwed it directly into antenna and it ran directly down to my living room. I went through the TV's auto-scan settings and it picked up a whole bunch of stations. If you actually watch it (I rarely do) look for tv-guide related apps that tell you what stations/what's on.

You can install these roof mounted antennas in your upper attic too, it's just a matter of figuring out how to run the wire to your TV. The best approach is following your old cable you aren't using anymore and literally cut the cable (compression tools are less than $20, and many even come with the ends,. Antennas run less than $40).