I’ve been very happy with my “Blackbird 4K DisplayPort 1.4 USB 3.0 4x1 KVM Switch, 4K@60Hz, HDR, YCbCr 4:4:4, HDCP 2.2”. I run an ultrawide at 3840x1600 @ 144 Hz, or HDR and 120 Hz G-Sync, and it works wonderfully. It took some effort to get all the required devices using the same connections - went through quite a few “USB-C to DP” cables from Amazon that had to be returned because they couldn’t do the high refresh like they claimed … but once I got everything set up, it’s worked like a dream, 3+ years and counting now I think.