I used to have a desktop pc but now just use a laptop: Dell XPS 15, 7590. This has:
CPU: Intel 9th-gen Core i9-9980HK.
RAM: 32GB DDR4/2666.
Display: 15.6-inch 4K OLED @ 60Hz.
GPU: GeForce GTX 1650.
Storage: 1GB Samsung NVMe M.2 SSD.
Ports: 2 USB Type A, 1 Thunderbolt 3 (4 lane), HDMI 2.0, Analog headphone, SD Card, Noble lock port
I add a Samsung T5 external 2Gb ssd and a Wacom small Intuos Pro digital painting tablet (pth-460) with thick and thin pens. I calibrate my laptop's 4k display with an xRite i1 Display Pro. I like a wired mouse and use a Steelseries Rival 310 and a small Steelseries mouse mat.
I use Photoshop and Corel Painter in equal measure.