Professional electrician and AV tech here.

Personally, and this may be overkill, but an HDMI/video matrix would do wonders to cut down the number of cables you’re working with. You’d be able to group your cables within that shelving unit, so that you can run a single HDMI to your TV. You analog consoles would need a digital converter between the console and the matrix, but since the TV itself has to do the conversation anyway and will already introduce input lag, you’re up a creek there anyway. I’d cut a plug behind the TV, as well as low volt passthrough. If you’re handy and can patch drywall/paint, I’d run smurf tube from that shelving unit through the wall to behind the TV. And as many others have said, velcro straps, not zipties.

If you don’t want to go bananas with all that, then velcro strap everything as neatly as you can. You’d also be wise to separate power and data/video cables.