For me, as someone who is especially interested in the unique, in niche, I would doubt that they will surpass them. If they added the Inuit, I would be curious to see if they might surpass the Maori, as that seems more plausible, but the Maori as they are now are more unique and more niche than any other civ to date.Maori right now will be my second option. We will see what Phoenicia or the Inca bring to see if they will surpass them.
Granted, other civs could have better abilities to help with winning a certain victory, but that's a very competitive view of this, while I'm looking for something more immersive, and something that brings me a different experience than I would have with playing any other civ. This is why I'm so hyped about the Maori civ.
Don't get me wrong, I would love to see those other civs too...Like you, I'm very fond of the idea of Mali as a civ, and am eager to play as them too.