The original IBM model M is still a winner, even though IBM hasn't made it in years (I forget who bought the rights, but you can still buy them, just not from IBM).
I'd recommend buying a cherry mx keyboard switch tester so you can see what switches you like and then buying like a Ducky or Varmilo from mechanicalkeyboards.com. You might also want to consider how loud it is when you type on it if you are using it in a shared office space.
If you really want to go all-in look up building your own mechanical keyboard.
mechanicalkeyboards.com has a buyer's guide if you want to see what they recommend https://mechanicalkeyboards.com/keyboard_guide.php
Of course it is all about what you like. The problem I have with the keyboard tester idea is you really need to spend a few days trying a keyboard before you know if you like it. You can't know with just 6 different keys how they will work after a full day of typing. If it weren't for that I'd endorse the idea.