Is there a best VR summary settings list for UE4.19? preferable oculus rift?
If you take the VR template as a base, you get a decent set to start with (note that several settings are forced through the ini files, like disabling SSR). Then, as always, it depends a lot on your project what additional tweaks you may need.
As a base I would stick to forward rendering though (since it has specifically been developed with VR and low latency in mind).
For additional VR-specific functionality I find the VR Expansion Plugin by Mordentral very useful - if you get through the initial learning curve (<link>).