Nearly every vanilla civ has been adjusted. Many underwhelming civs (e.g., Denmark, Iroquois, Byzantium) received complete overhauls, while strong ones (Poland, Babylon) were toned down.
Many civilizations have been tweaked to make late-game units like Landships and Panzers more impactful by guaranteeing strategic resource spawns on the map. How to Get Started How to Install and Play Lekmod (Civ 5 Multiplayer) civ 5 lekmod civ list
Greece — (Leader: Alexander or Pericles variants) Nearly every vanilla civ has been adjusted
Note: this is a curated, coherent list highlighting civs that are distinctive in LekMod rather than every minor variant. Byzantium) received complete overhauls
: Strong economic and plantation focus, making it a reliable "sim-city" choice.