Thanks for this great input!
#4 does seem like the best option, but doesn't it still leave the issue of the TV already using the optical input of the receiver? Where would I plug the output of the PC into then?
#3 I'm not using the TV as the monitor for the PC, and from what I've researched I cant pass video from my graphics card into my PC monitor and use an HMDI output to just pass the audio, as HDMI doesn't carry audio only.
#2 looks very good, this just pulls the audio from my HDMI and passes it to optical out, while the rest of the video signal is passed in to HDMI, correct? If so, do you know if this exists in a displayport format as well? I have a freesync monitor for my PC and plan on using this feature one I get the rest of my setup.
#1 also looks very promising, I'll have to do some further research on this method.
Again thank you so much for your help!