Roamio OTA but want upper Cable channels

I happily cut the cord on cable about a year ago, and have a Roamio OTA and Mini. Unfortunately, I'm missing ESPN and TnT. I have Netflix and HBO Now, generally stream them on my HPTC, which is networked (I previously ran WMC through Win 7 with HDHR's, but like the Tivo Interface).

Any suggestions on getting the upper channels with streaming, Android TV, Roku, etc? Would have liked to keep it all in Tivo-land, but with OTA only, that can't happen. . .

Cheers,
Joel