Flagg
The Most Electrifying Man in Sports Entertainment
Likely because:He's described as the last of the canonical Deathlords in Abyssals.
A) He was alive for at least 300 years after the beginning of the Usurpation, thanks to the Invisible Fortress, which means he was probably still alive when most of the other Deathlords were made, and
B) He was beaten to it by Walker in Darkness because he choked that bitch to death, stone cold.
-S