I suggest a DB8E with both panels aimed at 169 degrees magnetic for Seattle and an MCM 30-2476 or 2475 aimed at 187 degrees magnetic for Fox. Combine them with a UVSJ UHF/VHF combiner.
https://www.antennasdirect.com/store...Combiners.html
Avoid the MCM 33-2230 which has a higher insertion loss.
As a test, temporarily aim the DB8E at 285 degrees magnetic for KIRO 28 CBS. If you are able to receive it, you will need a separate UHF antenna for KIRO.
If you want to try a better preamp, I suggest the Antennas Direct Juice. A cheaper preamp is the RCA TVPRAMP1R. Its quality isn't quite as good, but it is better than the Winegard LNA-200.