Maggoth Lords
The Maggoth Lords or the Maggot Riders are the three Chaos Champions of Nurgle, Orghotts Daemonspew, Bloab Rotspawned, and Morbidex Twiceborn, introduced in the second End Times book. The three of them ruled over Icehorn Peak, a realm located in the Chaos Wastes. Their namesake are the hideous monsters known as Pox Maggoths, which they ride as a sign of Nurgle's special favor. They survived the transition to Age of Sigmar alongside The Glottkin and Gutrot Spume.
Orghotts Daemonspew
The leader of the group, and the de facto ruler of Icehorn Peak. Distinguishing him from other chaos characters, he's half-daemon, having been born from the union of a Great Unclean One and a human witch (don't think how that would work for the sake of your sanity). He's also old as fuck, having been alive before his companions and having participated in the Battle of Kislev's Gates during the Great War Against Chaos.
The fact that he's only half daemon angers him to no end, as he wishes to become a true daemon and obtain what he perceives to be his rightful heritage. He's tried many things to become a daemon, from literally walking to the Garden of Nurgle, which was always just out reach for him, and it was during one of these journeys he aquired his Rotaxes, to attempting to contract Nurgle's Rot so that he could at least turn into a Plaguebearer, but to no awail. Since then he's been trying to prove himself to Nurgle and become a Daemon Prince.
He died when Karl Franz ascended, being burnt to ash by the magic of the Incarnate of Heavens.
On the Tabletop
Bloab Rotspawned
Bloab was originally your regular northman warrior who worshipped Nurgle, albeit one with a habit of torturing small beings. Nurgle, loving all beings no matter what and taking offense that he would torture insects rather than kill opposing champions, decided to teach the warrior a lesson. After one of his hunting/torture trips, he fell asleep in a cave whilst Morrslieb was full. From there, a swarm of daemonflies flew down to his cave and laid their eggs inside his body before flying away.
The next morning, he awoke in pain, as the larvae ate his insides slowly until he was naught but his toughened skin. Nurgle however was merciful to him, and used his powers to ensure his survival, and bound the daemonflies to him. Since then, he has repented his former sins and has gained high favor in the eyes of Nurgle.
He died after Glottkin's armies were shattered, hunted down by the Sons of Shallya and killed by Elspeth von Draken.
He was reincarnated in Age of Sigmar, only to be killed again by the former Nurglite Stormcast Eternal Tornus the Redeemed. The other Maggoth Riders were able to ressurect him by throwing a single maggot into a pit full of captive ogres and allowing it to feast on their flesh and multiply, for as long as the swarm lives, so too shall Bloab.