I have an Odyssey G9 and need a more powerful KVM to support a 5120 x 1440 (4k equivalent) monitor with a 240Hz refresh rate. This KVM was perfect for my needs. I plugged in a USB hub in the front and connected a keyboard/mouse to it. You can use the keyboard/mouse ports on the back, but they switch based on hidden shortcuts. Not sure why it doesn't have good reviews, not many KVMs can run with DisplayPort in a high resolution setting.
NEWCARE HDMI KVM Switch: 4K@60Hz, 2x1 HDMI2.0 Ports + 3X USB KVM Ports - Share 2 Computers on UHD Monitor, with Wireless Keyboard and Mouse Support - USB Disk, Printer, USB Camera Compatible
10 Review
π TRENDnet TK-803R: 8-Port Rack Mount KVM Switch with VGA & USB Connection, USB/PS2 Support, Device Monitoring, Auto Scan - Control 8 Computers/Servers
10 Review
Enhance Productivity with CKL HDMI KVM 2 Port 4K 30Hz Dual Monitor Extended Display (CKL-922HUA)
10 Review
CKL Quad Monitor HDMI KVM Switch 4 Port 4K@30Hz with Cables - Extended and Mirrored Display Support for Windows, Linux, and Mac
11 Review