There's a lot of expensive suggestions, but one great work keyboard is the Microsoft Comfort Curve Keyboard 2000, it's becoming hard to find at is original price, but you can find a good used one for 20 bucks
It is a membrane keyboard, not mechanical, but it works well for me. The numpad is separate from the main keyboard, so that works well too.
It is wireless - which is a good thing and a bad thing. Good because it is convenient, bad because unlike the logitech M series, if you lose the usb radio, I don’t think you can order a replacement, so the keyboard becomes useless.
[0] https://www.microsoft.com/en-us/d/microsoft-sculpt-ergonomic...