Is this as simple as using VGA connection to all three monitors?
Display port can be adapted to VGA, as can the other ports. Do you mean that all monitor's ports need to be the same native type?
Not sure what your understanding of "native type" is, but, all I know is what I've been told by AMD contacts who have direct access to the driver team. It is my understanding that, as long as an adapter is in use on
any, but not all, of the displays, that vacates the "same connection" requirement. So, if one has enough DP ports and is using the same type adapters on ALL of the displays, that meets the requirement. But, if any display is connected differently, that one will show the tearing. This is why I place my DP-connected monitor off to one side so that my gaming focus on the center screen isn't significantly distracted by the tearing.
You're more than welcome to see if you can get all of the displays connected using VGA. It may do the trick, but, I'd be pleasantly surprised if it does.