Through the course of FFX, it is stated that there are four summoners that defeated Sin before Braska. They are Yunalesca, Gandof, Ohalland and Yocun.

So I thought it would be a fun little activity to make up what these four unseen Aeons would be. Here are mine

Yunalesca's Final Aeon
I think this would be a weapon type, since Zaon in X-2 is also Paragon. It would fight like a berserker, and be weak in terms of Magic

Gandof's Final Aeon
For some reason I picture his to be Ramuh. He is the one who made the towers on the thunder plains, so it fits in my head at least

Ohalland's Final Aeon
Leviathan has to be Ohallands final Aeon, since Ohalland played blitzball as well. Also spira needs a water Aeon

Yocun's Final Aeon
I would say Yocun's Final Aeon is one similar to gilgamesh, in that it would fight with a variety of Weapons.

What do you think about the other four Final Aeons EoFF?