Found a Dell E170Sb (manufactured March 2012) that would display 15khz Amiga 500 NTSC signals on a buffered VGA adapter.
This LCD monitor has a 4:3 aspect ratio.
Setting pixel clock to 92 will eliminate all of the banding.
edit: I have come across a REV A00 E170Sb that wouldn't display a 15 khz signal, (It was made in 2009), so maybe it's REV A01 that work.
