Great, Ultra, and Master League Tier Lists are being overhauled.

PokéBase

Ultra League Tier List

Attackers Tier List

Dynamax Tier List

Great League Tier List

Ultra League Tier List

Master League Tier List

Best Attackers by Type

S Tier

In-game Search string

Shadow Corviknight

Shadow Empoleon

A+ Tier

In-game Search string

Shadow Forretress

A Tier

In-game Search string

B+ Tier

B Tier

C Tier