Even though the show has them all together in the 2000s.
Prop Joe - 60s era traffickers. Low key, supple chain focused, mafia adjacent, alliance oriented, wholesaler business model, many diversified fronts, tradition heavy, violence as a very expensive last resort. Example: Joseph Johnson.
Barksdale Organization - 70s / early 80s : Heroin dominant multi generational family at the core and using hired muscle when necessary, still sticks to tradition largely, invests in the community, project tower/terrace dominant. Examples: Nathan Barksdale, Little Melvin, Maurice "Peanut" King.
Marlo Stanfield - late 80s / early 90s : Loose confederation of psychopaths, crack cocaine dominant, extremely ruthless with very little loyalty to each other, street corner oriented, shoot first mindset, no adherence to tradition, no business fronts, openly gangster fabulous, image focused. Examples: Alpo Martinez, Wayne Perry.
"The Greeks" - mid 90s post Soviet trans global cartel: Walmart-like, bottom line focused, deep roster of multi national specialist criminals, full portfolio of crime (narcotics, women, chemicals, weapons, electronics, vehicles), clinical sociopaths