Ages ago (about 25 years back) in the land of the 60-card Magic: the Gathering tournaments, a deck called The Rock was born. It got its monicker based on the famous wrestler of the same name and his milllliiiooons....of tokens.
The Rock was a midrange deck that was token-centric leveraging the power of Deranged Hermit. Well, how does one make a Rock deck for a 100-card format? I'm not entirely sure, but I needed something to tie this together, full disclosure. Alrighty then, here are the best Golgari (that's black and green for ya, bub) commanders that rock.
Chatterfang, Squirrel General
Many a planeswalker has belittled the power of Emrakul, the Aeons Torn and that 15 1/1 squirrels could take the titan down. But, Magic squirrels are built different. Take Chatterfang, Squirrel General for instance. This 3/3 for three mana Squirrel Warrior produces 1/1 Green Squirrel tokens for every token you make. Yep, every token. Doesn't matter if it's a creature or a Treasure, Chatty Fang makes you a 1/1 critter.
For a Black mana, you can sacrifice however many squirrels and give +X/-X to any target - basically killing any creature. Oh, and he has forestwalk too!'
New cards from Bloomburrow and Modern Horizons play extremely well with Chatterfang's token producing: Hazel of the Rootbloom, Camellia, the Seedmiser, Valley Rotcaller, and Thornvault Forager round up the posse. While Warren Soultrader, Nadier's Nightblade, and Marionette Apprentice push the deck towards the realm of the Aristocrats.
Oh, and don't forget about Three Tree City. I hear that's a great card for squirrels.
Lathril, Blade of the Elves
Elves are one of the most popular creature types in Magic. In Commander, there are more than a couple of strong options but none as potent as Lathril, Blade of the Elves. This Elf Noble is a 2/3 for four mana that, shocker, creates a bunch of tokens equal to the damage she deals. With menace, hitting your opponent is made easier. So pump up her strength with fellow elven lords and ladies Imperious Perfect, Elvish Archdruid, Canopy Tactician, and Leaf-Crowned Visionary.
With more tokens, Lathril's third ability can wipe out multiple opponents at once by tapping 10 Elves to deal 10 life while coolly gaining you 10 too.
Staples like Beast Whisperer, Reclamation Sage, and Circle of Dreams Druid lead the elven army but there are plenty more to choose from.
You don't have to keep the elvish theme though as Lathril plays extremely well with boars. End-Raze Forerunners and Craterhoof Behemoth, to be specific.
Ygra, Eater of All
Bloomburrow has been a boon so far to the Golgari color pair. Needless to say, Black and Green afficionados have been eating. But, none have eaten more than Ygra, Eater of All.
This five mana 6/6 Elemental Cat is a bit of a strange one. Ygra makes all other creatures into Food and whenever any Food is put into a graveyard, this hungry cat gets bigger. It also has Ward too with the cost of sacrificing a food - making Ygra more gigantic.
With all of the Food support in the past years, you'll have no end of tasty options. Let me pick the best from the buffet: Gilded Goose, Peregrin Took, and Savvy Hunter produce a consistent feast.
What to do with all that grub? Bristlebud Farmer, Elanor Gardner, Greta, Sweettooth Scourge, and Gyome, Master Chef are some of the best additions to your kitchen.
Running Ygra, Eater of All makes all creatures on the battlefield your prey. Eat up.
Meren of Clan Nel Toth
One thing that the Golgari swarm is know for is graveyard shenanigans. Leading the necromantic pack is Human Shaman Meren of Clan Nel Toth. This 3/4 for four is very experienced in reanimation. In fact, whenever a creature you control dies, she gives you an experience counter. What for? Well, at the end of your turn Meren returns a creature from the 'yard that has the same or lesser mana value as your counters.
Stock the tombs with Buried Alive, Entomb, and Persist because with Meren, those cards are tutors.
What to reanimate? Sheoldred, Whispering One is a start. Too small? How about Razaketh, the Fouldblooded? Powerful fatties in Green, Black, or colorless (Blightsteel Colossus? It That Betrays?) are in no short supply.
Gather all your sacrifice outlets and token producers to pump up that experience: Ashnod's Altar and Altar of Dementia are no-brainers. Avenger of Zendikar and Izoni, Thousand-Eyed are your army-in-a-can bets.
Meren is a menace your opponents will have a hard time stopping.
The Gitrog Monster
The Gitrog, Ravenous Ride is a frog commander that is as fearsome and as infamous as... oh, wrong frog? Thalia and the Gitrog Monster is an Abzan commander that - oh, we're only talking about Golgari?
Ok, let's do that once more. The Gitrog Monster is one of the most feared commanders in the format. This 6/6 for five deathtouching Frog Horror eats one of your lands each upkeep. But, it allows you to play an extra land per turn. Also, it draws you a card every time a land hits the yard from anywhere. The Gitrog combo is well known to be as lethal as it is complex to understand the first time. Basically, all you need is the Frog, a discard outlet, and Dakmor Salvage. This trick gets you as many cards in your graveyard as you want.
This is a lands-matter combo deck. So, staples such as Life from the Loam, Ramunap Excavator, Crop Rotation, and Splendid Reclamation are auto-includes.
The Gitrog, like most Golgari commanders, make heavy use of the graveyard. So cards such as Six, Skull Prophet, and Nyx Weaver are your go-to self millers.
The preferred discard outlet is Oblivion Crown as flash lets you cast it when you're ready to combo off.
You would need either Ulamog, the Infinite Gyre or Kozilek, Butcher of Truth so as not to mill yourself to death. The Gitrog Monster is an all-in deck for those who're feeling froggy.
For Those About to Rock
There you have it, folks - five Golgari commanders that not only rock but can absolutely roll. Take your pick from an elvish army, a swarm of squirrels, an all you can eat feast, necromancy, or Froggy combo shenanigans and swampwalk your way through the Bayou.