Cordcutter here as well. My experience with HD antennae hasn't been great, although it seems to be more due to my basement location than anything else. I still get enough channels to keep it, but they periodically cut in and out, which is a bit annoying.

I've spent a good bit of time experimenting with Kodi add-ons and Chromecast-compatible apps. Those have worked pretty well for supplementing my substantial amount of local media.