Another instance of the Admirals being underrated, especially Sakazuki.
I think Luffy would be able to take on Sakzuki EoS but with extreme diff.
Saying that, I don't see how you could give us anything close to what will happen at the EoS, there is so much more to happen which will effect it.
For all we know Teach and Sakazuki could be dead by the end. Maybe a new character which hasn't been introduced yet will be the EoS villain for all we know. Look at when Dressrosa first started, people predicted how it would go down and tbh most predictions sounded extremely likely. I also remember that one guy making a thread around the time saying Sabo would show up in the arc and everyone ridiculing him. Now look what happened

we had a new Admiral and Sabos return.
My point being all you posted above will most likely not happen at all the way you think or anybody else does.
Personally, I think the entirety of the World Government will be the villain, but it wouldn't surprise me if i'm wrong.