On a serious note, please do not spend your hard-earned money on **** like i9 or 3900x (edit: i9 series truly are trash, while 3900X is a very solid cpu, just not needed for everyone)
That's definitely not on the "best bang for the buck" list for any wise consumer.
If you are looking to broaden your gaming past RoR and also stream, then sure, high-end spec which costs 2x-3x more than optimal setup would be juicier, but also, with the RTX 3x series coming out and Intel's "comeback" CPUs on horizon, I'd not spend top dollar for soon to be mediocre components.
Here's a list that I quickly set up for you, that I'd recommend for any casual/average (which means non-hardcore benchmarker, 4k ultra settings players or extensive video rendering gurus):
https://pcpartpicker.com/list/W9Qndm
Ryzen 5 3600X ~240$ 6 cores but you don't really need more, especially for RoR. It overclocks like a champ and is undeniably best bang for the buck for gaming as you are hardly ever cpu/core limited.
Noctua NH-D15 82.5 CFM CPU Cooler - 90$ - cheaper, better build quality than low-end AIO's from Corsair etc, quieter and overall more reliable than most AIO (or just watercooling in general). Just make sure you check dimensions of the case to make sure it fits. Noctura fans have never disappointed and this will keep your OC'd Ryzen as cool as watercooling. If you'd be running 3900X OC'd to the max, then I'd go with other route, but for 3600X - this is perfect if not a bit overkill.
MSI B450 TOMAHAWK ATX AM4 Motherboard MAX - 110$ - Tomahawks have been insane value performers since release, because they offer so much better OC potential compared to other B boards. You literally get the performance of a mediocre 570 out of this one for a fraction of a price. Good vrm, good heatsinks - good ports - good everything. MAX version just ensures sweeter RAM speeds.
G.Skill Ripjaws V 16 GB (2 x 8 GB) DDR4-3600 Memory - 80$ - Ryzen cpu's like their fast memory speeds and now that the RAM prices have tanked compared to the craziness they used to be, this is a solid choice.
Intel 660p Series 1.02 TB M.2-2280 NVME Solid State Drive - 100$ - You won't feel the difference of high end m2 nvme and Intels 660p series when gaming. But 660p is considerably cheaper. There is a difference of course, speed-wise (it's QLC not MLC) but given the price tag and the performance it's still the best choice for gaming.
NVIDIA GeForce RTX 2070 SUPER 8 GB Video Card - 500$ - Not really needed for War, anything would do, but this is currently, once again the best price/performance card.
Super series added few points to the benchmark charts and this is a card that won't be drastically losing value if you plan to upgrade to the 3xxx series in the future.
2080 (especially non-super) is a rather poor decision right now, it's overpriced and underperforming for the dollar/punch ratio.
I would highly recommend getting OfferUp or checking Facebook Marketplace for a used 2070 card, which you can buy for half a price. I've bought most of my GPU's second hand because it just makes much more sense, but you need to know how to verify that you're getting the real and functional thing.
Corsair RM (2019) 750 W 80+ Gold Certified Fully Modular ATX Power Supply - 120$ - bit of the lavish side here, but fully modular (way less hassle with cables) PSU is very convenient plus the 750W will keep you ready for any future upgrades. While Bronze certified is a minimum then Gold makes it even better to ensure you won't be frying your motherboard and all your components at some point
This is about ~1200$ build minus the case + case fans which is a personal preference and should be decided based on cable management, dimensions (heatsinks, fans) and for the sheer looks.
Source: ~22 years of knowledge building PCs for gaming.