If we are talking Civ5, it has to be Ethiopia. If we are talking Civ6, although I haven't played them all more than once, I really enjoyed playing as Brazil.
His spags spaghetti, spags weak, spags spaghetti, There's spag on his ghetti already, mom's spaghetti, He's ghetti, but spag the ghetti he looks spag and ghetti to meat balls, But he keeps on spaghetting what he spag down, The spaghetti goes so loud, He spags his mouth, but the spaghetti won't come out, He's spag how, everybody's ghetti now Pot boils, grubs up, spaghetti, blaow!