Tough question. The builds keep changing with time, it depends on your desired resolution+refresh rate, and also depends on the game. For example the performance hit going from 1080p to 4k is huge. Meanwhile something like WoW/Overwatch won't exactly "scale" like crazy between a midrange and high-end build.
Which is why the best advice is always going to be "buy the best build you can afford."
If you've got plenty of money to spend but are unsure what you're going to get with a certain build, then you'll at least need to mention whether what kinds of games you play and your resolution+refresh rate. That'll get you some advice as to what build you should aim for.