Well, you mentioned some just now, and there's also Alexander McGillivray, I guess. Rather than play this off coolly though I'll go ahead and admit that I actually just confused the Creek and the Cree, and I only know about McGillivray because I googled "Creek Leaders" and he was the first thing that came up.
For reasons cited on other pages, including his agenda duplicating agendas already in the game.
I don't think you couldn't do something with a Tin Hinan leader-
You could do some interesting psychoanalytics here.
Calvin Coolidge (America) (16-3)=13 Would I be pleased to see Coolidge as the second American leader? Definitely not...he's also too close in era to Teddy Roosevelt, and probably have no spoken dialogue
Also this is actually funny, have a lollipop.

Er, well...a slice of bread.
Akhenaten 10
Alexander II (Russia) 21
Alexios I Komnenos (Byzantium) 21 Sorry Kimiimaro, but I can't let Alexios run away with this one just yet. We have to keep things reasonably level until MorningCalm and Zaarin move on from Akhenaten, at which point the real competition will begin.
Atahualpa (Inca) 22
Aurangzeb (India / Mughal) 23
Calvin Coolidge (America) 13 I'll take another break from Aurangzeb to stick up for Silent Cal. I will admit something about Coolidge though: I never actually got around to reading his biography. However, what I know of his convictions and his demeanor, I like him.
Coloman the Learned (Hungary) 18
Edward the Confessor (England) 17
Hezekiah (Judah) 21
Menawa (Creek) 19
Napoleon III (France) 22
Powhatan (Powhatan Confederacy) 22
Vercingetorix (Celts / Gauls) 18
Yongle Emperor (China) 21
I was considering upvoting Akhentaten, but I didn't want to start a deadlock of Siptah, Zaarin and me upvoting him and then MorningCalm downvoting him, letting Guando and Kimiimari have all the fun.