Best: Iroquois. The guy is solid in every era.
2nd best: Greece. His CS allies are fiercely loyal to the point that bidding war is pointless....
Isabella. Her incessant yapping gets me. Other than that, all civs that hog city states -- democracy at its worst.
Babylon: Ingenuity - 50
Greece: Hellenic League - 28
Korea: Scholars of the Jade Hall - 52 + 2 = 54
Poland: Solidarity - 49 - 4 = 45
Separate names with a comma.