I just built a Ryzen R7 2700 (currently OCed to 4.0Ghz, stress-testing now), 16GB GSKill RGB DDR4-3600 RAM, 2x 1TB 660p Intel PCI-E 3.0 x4 NVMe SSDs, Asus ROG STRIX B450-F Gaming ATX mobo, and a CoolerMaster MasterLiquid Lite 240mm AIO WC kit, keeps it at 71C here (63-65F ambient), even at 4.0Ghz and 1.325V. Rosewill Stryker M case. (Tight fit, actually not too happy about it, could only get a few mobo screws in, mobo wouldn't seat square, primarily because of the exhaust chassis fan, top-mounted 240mm WC, and the fact that the Asus ROG STRIX B450-F Gaming ATX mobo, has an "integrated" I/O shield, and a plastic shroud / cover on it. Though the logo lights up!)
PM me if you would like something like that custom-built.At 4Ghz, it's a screamer. But the Intel 9700K / 9900K clock even higher, although de-lidding is basically a requirement with Intel's high-end now, to keep temps in check. And an Intel build will cost twice as much.
Edit: I got these parts on a pretty decent sale, but I could build one just like it for $1100, and then add a $400 RTX 2060 card.