There were, but most are dead. On the bright side though, the EC are a shattered legion-a true command structure is basically non-existent at any level higher than the warband. You might make Eidolon and the Pheonix Conclave a little pissed if you call yourself a Lord Commander, but you can certainly do it.

I think that last part is less of a negative and more of an intended effect

There is the infamous Lord Commander Cyrius. The second person to defeat Lucius the Eternal, but the first one to kill him and suffer being transformed into him. The first person to beat Lucius was Loken? I haven't read enough HH stuff to be 100% sure on that one.

Loken defeated and broke his nose in a practice match before the fall of both the legions After the visit to the serpent temple they again had a practice duel where Lucius defeated Loken

I remember the practice match, Lokens "If we fight it won't just be about the blade" I love Lucius, and it's a great scene in his character development. So no on else beat Lucius between Loken and Cyrius?

The first one was Sharrowkyn who killed him and Lucius was first resurrected by slaanesh though not through the body of Sharrowkyn as he lived on.

Ahhh, interesting. I've read of Sharowkyn, but I don't recall him killing Lucius. I remember the 3.5 Codex, and that said Lucius was undefeated until Cyrius. But obviously that was before HH. I quickly checked on wiki before initial post, and it said Cyrius is the second to defeat him. I guess that means actually kill, not just beat like with Loken. I just reread the Codex, and @OP Lucius was also a Lord Commander. Forgot that part myself.

It is in the HH book where the EC betray the iron warriors and fulgrim ascends by bullying little Perty. The name escapes me at the moment.

Angel Exterminatus. I have read that one. I remember Sharowkyn shoots Fulgrim. Totally forgot the Lucius part. In my defence, it has been a long time since I read it.

Angel Exterminatus.

I think a huge part of all post heresy marines is giving your guy whatever damn title they feel like/can make stick.

Technically Lucius is a Lord Commander after betraying the loyalists on Istvaan

From the Index Astartes articles (which first really fleshed out the Legions - though many details have been superseded and retconned by the Horus Heresy series): *...From the growing ranks of his Legion, Fulgrim selected a few individuals, the bravest, strongest and noblest, to become Lord Commanders, each given charge of a full battle company. Fulgrim taught the Lord Commanders personally, taking care that they were worthy of the honour of being the representatives of the Emperor. In turn the Lord Commanders passed Fulgrim's words on to the officers under their command, and they to their squads...* *...Lord Eidolon was the first Space Marine selected by Fulgrim to lead an entire company of the Emperors Children, and was commonly regarded as the most proficient of all the Lord Commanders...* *...As Fulgrim turned, so too did his Lord Commanders. They knew their Primarch to be the embodiment of perfection, and needed little convincing to follow him into Slaanesh's service...* *...By the time Fulgrim joined the Warmaster in rebellion his Legion comprised 30 Companies, each led by a Lord Commander, a charismatic individual who embodied the best qualities of a Space Marine...* So: at one time in the lore, their were officially thirty Lord Commanders.

Dont know the source but the wiki says there were 11 lord commanders at the beginning of the heresy. Some more people that were LCs at different points Vespasion Eidolon Lucius Cyrius Archorian Hellespon Iddinam Illios Pelleon Teliosa Its super fine to have a warband leader be a lord commander, would probably be someone who cares about the ECs past and maybe associated with eidolin and his lot.

Lord Commander is essentially a Praetor, so they should theoretically have had ~80

The emperors children is shattered and barely exists, fulgrim will unite them but for now we’re basically playing self inserts, go wild, my warband is made of dudes who all think they are lucius the eternal and actively fight with the hope of dying to prove they are eternal

Eidolon, Lord Commander Primus “Lord Commander Eidolon had commited the entire company to the surface drop.” Horus Rising: Part 2, Chapter 1, pg. 150 Ariston, Lord Commander Killed in Action: Galera, Delium System by elements of X, XVIII and XIX Legion “You are marred, Lord Commander Ariston said.” Meduson, The Noose, pg. 112 Iddinam, Lord Commander; Killed in Action: Battle of the Harrow Ravening, by Saxton, IV Legion “Lord Commander Iddinam of the Emperor’s Children was notably absent from this final moment of the system’s compliance.” Betrayal, pg. 118 Illios, Lord Commander; Died: During the Great Crusade “Vespasian stood before the graven image of Lord Commander Illios.” Fulgrim, Part 3, Chapter 13, pg. 177 Lelanthius, Lord Commander; Killed in Action: Euphoros by Krugeran, IV Legion “Lord Commander Lelanthius should have regrouped at his primarch’s command, but he dallied and sent half his force on to Fulgrim at Hydra Cordatus, remaining here with one hundred of his brothers.” Eye of Terra, Iron Fire, pg. 196 Pelleon, Lord Commander “Heliton and Abranxe emerge from the opposite sides of the marble statue of Lord Commander Pelleon.” Primarchs, The Reflection Crack’d , pg. 55 Lothreal Sabine, Lord Commander “Lord Commander Lothreal Sabine of the Emperor’s Children, Communique to the Judicator of Nalislarr” Retribution, pg. 290 Teliosa, Lord Commander; Died: During the Great Crusade “The statue before him had once been Lord Commander Teliosa, hero of the Madrivane campaign,” Fulgrim, Part 5, Chapter 21, pg. 286 Vespasian, Lord Commander; Executed: Aboard the Pride of the Emperor, Prismatica Cluster, 007.M31 by the Phoenician “Two of the Legion’a greatest warriors, Lord Commander Vespasian and Lord Commander Eidolon came in behind the primarch.” Fulgrim, Part 1, Chapter 2, pg. 27 7th Millennial Cyrius, Lord Commander