As mentioned, the main Klipper repo has a number of example config files. In general, they try to follow the guidelines at: Example configurations - Klipper documentation
There has also been discussions on the past about changing the layout of these example configs: Reworking example config files to have pin aliases at top of file
Finally, note that we’ll probably add a default for the virtual_sdcard on_error_gcode parameter after the v0.11.0 release.
-Kevin