I have my tower pc connected to the TV with a 5 metre HDMI lead, this connection method is the fastest to activate as I only have to change to the right HDMI input on the TV.
To control the PC while connected, I bought one of these hand held backlit keyboards - great in the dark.
https://www.ebay.co.uk/itm/163830222866
On this one, you can flip it over and the other side is a mouse touch pad, it does 2 finger scrolling for web pages, and if you tap and release 2 fingers at the same time you get the right click menu.
You can control 90% of windows with it, the only thing it will not do is select multiple individual items in Explorer (as in hold down CTRL and click on several different items to select them), or do drag and drop, but then for proper file management tasks I am sat in front of the PC.
K-Lite Codec pack is installed which comes with Media Player Classic, and convenient shortcut keys are programmed to keys on the hand held keyboard.
I can also connect wirelessly to the TV, in Windows 10 notification center click on 'Connect' and select the LG TV, then change connection type to 'Mirror'.
This method works ok, but there is just the hassle of connecting it every time you want to use it that way.
Try it out on your TV, I'm not sure if you need a certain level of graphics card to do it, but I have connected my sisters laptop this way ok.