If you've got a sure-fire "this will work" recipe for either XRDP or VNC, I'd love to see it. I have a similar issue with XRDP going to a blank screen. The only thing I could find (a few months ago) ...

I have tried all sorts of flavours of VNC. Some that ran in Classic, and a couple that ran natively in OS X. I get the same problem with all of them. Basically the program runs, and I enter the server ...

VNC Connect offers the speed of direct connections, as well as portal-based management for only a few bucks per computer. It’s not dead easy to set up, but it offers the broadest operating system ...