Hey @RSpreviz! Welcome to the forums!
Disclaimer: This is my PERSONAL opinion, and it does not represent the views of Epic Games, Unreal Engine, or their partners. It is simply something that I suggest because of personal experience.
So you need a workstation laptop, if it doesn’t say “Workstation” it’s likely that it isn’t going to meet your standards, just as a quick tip. SOME “Gaming” laptops will be acceptable, but not most.
Now as far as a SPECIFIC laptop, I suggest the ASUS Zenbook Pro Duo. It has about as good of specs as you’re going to get in a laptop, for just under $3k.
With this, you’re looking at an i9 5.3 GHz processor, an Nvidia RTX 2060, 4k 15-inch (for portability) fold-back touch screen, 32+ GB RAM, and dual-fan cooling (AND KEEP the fans unblocked, rendering is very heat-intensive) all in a low-profile, on-the-go package. The only downside is the battery life, rated at 5 hours or so… Which is pretty standard for workstations, lots of power. If they made it 10 hours the battery would be so heavy the laptop might as well be a desktop. 
But that’s about as future-proofed of a rendering laptop you can get right now, in my honest opinion.
I would also suggest “Downgrading” to Windows 10 until more bugs get worked out of 11, to reduce program crashes.