I have a Logitech K830, it's great. Alas they're not manufactured any more.

Modern equivalents are a lot cheaper. I think they might not have the backlight feature which is extremely useful, and I've dropped mine many times, even spilled coffee over it, and it still works flawlessly.

a game controller works also really well with something like Steam Big Picture and Media Players

i just use the cheapest wireless keyboard and mouse I can. I’m accessing content through the browser so there’s enough typing that I wouldn’t want a non keyboard personally.

Imo you only need remote like hardware if you’re planning to scroll through Netflix style walls of content.

I just use an Apple TV box these days, but ~15 years ago I was running a Windows 7 Media Center PC for DVR and a few saved movies. The best remote was a TiVo Slide Pro (no longer made, and my wife broke the one we had). Normal TiVo remote buttons on top, slides open to expose a small keyboard. They occasionally show up on eBay or if you have a local source, use that. You'll need one that has the RF dongle to be able to use the keyboard with anything other than an RF-capable TiVo.