@Michael3442 

I think the reason most do not replay is because there are so many options and it varies based on so many factors, Also, what is best for me may not be best for you.

A few points:

• The best would be to have Ethernet cables attached between the devices and router.
• A Ethernet switch would work if running a line from the router to the switch then to the devices. If you can run one cable, why not four?
• Get another router and running it in AP mode is another option.
• Instead of moving the router, put an extender/booster/repeater/travel router in the middle of the house. Each has it pros and cons.
• If running wires is an issue, there are wireless connecters as well as power line adapters.
• Can the the TV, HTPC, and DVD work using WIFI?
• Consider a Mesh system

I have a small house but due to house design, the routers location due to ISP drop, other devices such as phone system and security DVR, and objects interfering with the WIFI, I chose to add an inexpensive extender (RE220) and placed it in the center of my house only 12-15 feet from the router. This covered my weak spots. The extender plugs into a electrical plug, and connects to my router via WIFI. It is slower than if connected directly to the router via WIFI. The key with extenders is to place it in between the router and the dead spots.

I also found moving the router only a few feet, adjusting the antenna, and turning it about 30 degrees helped the coverage a lot. Height helps also.