I believe the slingbox is dead or close to not being supported anymore.
Probably DirecTV Stream would be your best bet, but if I remember right It will only do locals in the area you are in.
I have used Tivo's with cable and now OTA but not sure I would invest in Tivo equipment any more. They seem to be dying a slow death also.
Tablo looks interesting but I really don't know of a product that does what slingbox did or as well as it did it.
Tablo is a DVR for cord cutters who use an Over-the-Air antenna to watch free live, local TV.
www.tablotv.com
I currently use a OTA Tivo Bolt, Evoca TV (only in limited areas), a Roku and streaming services, Netflix, Amazon, Apple TV and Paramount + to get what I used to be able to get with one service.
Evoca uses Next-Generation broadcast technology to provide high quality, reliable programming at a fraction of the cost of cable.
evoca.tv
DirecTV and Comcast have gotten so expensive it was not worth it anymore to me. The best content now seems to be on multiple streaming services.
I guess we are dinosaurs. The younger generations want nothing to do with DVR's or OTA TV. They want everything on their phones and streaming.