The XPC SH370R6 supports Coffee Lake CPUs up to i7-8700K with max 95 W TDP, plus there's enough room for up to 64 GB of DDR4-2666 RAM, 4 SATA bays and even a PCIe 3.0 16x slot for discrete GPUs. While it is not the most compact barebone out there, the new XPC SH370R6 can easily replace the usual desktop PCs or even more cumbersome workstations.
https://www.notebookcheck.net/Shuttle-announces-new-compact-XPC-sereis-supporting-gen-8-desktop-Intel-CPUs.315976.0.html