Executor II, Star Wars Fanon

Executor II was the first official flagship of the New Galactic Empire. It was built on the orders of Kohl Seerdon so as to terrorize planetary systems. Its attack force consisted of more troops than the Empire's base on Wayland. In 15 ABY, Kohl Seerdon ordered the creation of a flagship for the Empire. Admiral Delak Krennel. Executor at Wookieepedia, the Star Wars Wiki

Team opinion on fanon (in general)

Republic -- Judicator Star Destroyers by Varient54 on DeviantArt

Star Wars Fanon - Galactic Empire: Galactic Empire organizations

Vengeance (Executor-class), Star Wars Fanon

Was there a ship class LARGER than Super Star Destroyers?

Star Wars: ROE - Ship and Technology Submissions & Critiques

Super Star Destroyer Executor II

The Executor by ExoticcTofu on DeviantArt

The Ship Of The Dead (Star Trek Discovery) -vs- Executor-Class

Galactic Alliance in trouble image - Legacy Era: Second Imperial

Ship Of The Day Executor image - Awakening of the Rebellion 2.8