Best Root Method?

[Schwifty]

I have a Galaxy S8+ locked to AT&T.
Android: 8.0
Model: SM-G955U
Bootloader: Locked
Build: R16NW. G955USQS3CRE2

I've read normal methods don't work for the Snapdragon model CPU.

What's best way?

 

[Liquified]

Xda usually holds the best tutorials when it comes to rooting.