Elizabeth (Peter's daughter), Marfa Boretskaya (last leader of Novgorod) and Sophia Alekseyevna are also good choices for female Russian leaders
I don't want to be rude, but Sophia Alekseyevna and Elizabeth of Russia are closer to Peter's era than Catherine which was my main problem already for picking Catherine. It is like picking Anne of Austria instead of Louis XIV, or Louis XVI which is midway between Louis XIV and Napoléon.
I wanted to represent another period of Russia. Soviet Russia is out of question (Stalin is not coming back), so that is why I really really wanted Saint Olga of Kiev, of the Kievan Rus period.
Marfa Boretskaya is a very interesting figure, yet wasn't in charge of Russia and her rebellion didn't end well. In Civilization V, Maria I was, at best, highly mocked for leading Portugal: she is
not a "
greatly admired figure in both Portugal and Brazil" contrary what the Civilopedia is telling. Even Catherine de Medici, an actual regent, was seen as a poor choice (including myself before she grew on me).
Well, I'm sure me and many others would take a non Epic of Gilgamesh, Gilgamesh.

Not sure what I'd give him though. Maybe something to do with actually building up Uruk, as a cradle of civilization?
Uruk Period-50% faster production on districts that replace farms?
A Gilgamesh persona would probably a good move for marketing. Gilgabro is highly popular. I suppose they tried to replicate it with Julius Caesar who has the same body (he inherited his huge hands, which didn't felt as weird, weirdly).
But... what about another leader of Sumeria? Someone like Sargon to have a rivalry between Uruk and Akkad. There is a problem: Sumeria is very "Gilgamesh" like, as Sumerian ability is an extension to Gilgamesh. But also, if Sargon is coming, we need a new City-State replacement (Assur / Nineveh?). Which would be too much work for a Leader Pass. But at least, the ability write itself! Conquer!
Well North Africa needs something, if we can't get a Berber/Morocco civ. At least I didn't give him elephants and absurd early game mountain movement.
I agree, but Carthage is already there with Dido and her
"Founder of Carthage". So there is problem for me. But I would argue that a Leader couldn't fix a lack of representation. So... they should introduce new Civilizations instead. A Civilization & Leader Pass?!
I'd love Louis XIV but they literally gave Magnificence Catherine the bonuses I'd want for him. Napoleon at least is from a different time period than the other leaders.
Also, the game introduced Catherine de Medici and Eleanor of Aquitaine. Two obscur and not "highly marketable" leaders. I am glad, because I absolutely love Eleanor as a historical figure, and I am ecstatic about her crazy ability. So really, nothing prevent to add a "overused" French leader.
I would argue that Kristina stole Louis XIV ability: just change "Queen's Bibliotheque" with either "Versailles Palace" or the "Louvre Palace", and voila!
Anything to get her in the game.
Plus, the Leader Pass introduced 6 female characters (one-third) such as Theodora, Wu Zetian, Cleopatra, Elizabeth I, Victoria and Mbande Nzinga, with 2 Persona. So if we follow the same formula, we need to introduce 6 more leaders. To be fair, we cannot go with obscur leader each time for everyone.