Moonllacer

PCPartPicker Part List Type Item Price CPU AMD Ryzen 9 3900X 3.8 GHz 12-Core Processor $439.99 @ Amazon CPU Cooler NZXT Kraken X63 98.17 CFM Liquid CPU Cooler $149.82 @ Amazon Motherboard Gigabyte X570 GAMING X ATX AM4 Motherboard $159.00 @ Amazon Memory Corsair Vengeance LPX 16 GB (2 x 8 GB) DDR4-3200 CL16 Memory $62.99 @ Amazon Storage Samsung 860 Evo 500 GB 2.5" Solid State Drive $64.98 @ Amazon Storage Seagate Barracuda Compute 2 TB 3.5" 7200RPM Internal Hard Drive $54.99 @ Newegg Video Card XFX Radeon RX 5700 XT 8 GB THICC III Ultra Video Card $421.14 @ Amazon Case NZXT H510 Elite ATX Mid Tower Case $149.99 @ Amazon Power Supply Corsair RMx (2018) 850 W 80+ Gold Certified Fully Modular ATX Power Supply $144.99 @ Best Buy   Prices include shipping, taxes, rebates, and discounts     Total $1647.89   Generated by PCPartPicker 2020-10-23 10:38 EDT-0400    
You could obviously change the gpu and case for better airflow and maybe use a 5000 series ryzen cpu (prices are US btw)

The franchise is excellent.  It’s a fascinating concept that has repetitively been done well.  I was given to understand that the reason fallout76 was such a horrific mutant hellspawn was a bunch of stuff having to do with making paper checkboxes for financials people who knew and cared nothing about video games.  I suspect fallout 76 could be fixed.  It would require removal of a lot of the horrible crap that got added for that purpose and the reworking of some other stuff that got neglected so that garbage could be added.  If wastelanders is an attempt to do that it would be worth seeing.  The company expended so much public trust with the big sellout though that I’d have to see what it looked like first.  

What @Fasauceome said. Hard to go wrong with the RMx. 
 
I personally have used both Corsair and Seasonic 'high-end' PSUs and my preference is Corsair- thats just me though 

so you could easily max out your budget with and 850 watt from corsair thats 129.99 just in case you want to overclock but if you just wanna give your cpu/gpu a little headroom to boost on their own go for any 550-650 watt with at least and 80+ gold rating
corsair 850 watt: https://pcpartpicker.com/mr/amazon/VgQG3C