ok I was just curious who was the strongest

the neraverin
the hero of kavatch
the last dragonborn

all have killed gods or extremly powerful/close to god like beings

the neraverine killed amalexia and dagoth ur(maybe vivic)
The hero of kavatch killed jygalagg, manimarco, and the guy from kntn(not even going to try to spell his name)
The last dragonborn killed alduin + harkon and mirak

now I an assuming that all of them are currently alive
the neraverine becomes immortal
and it is heavily implied that the hero of kavatch become the god/deadric prince sheogorath(but really all we know is that the guy who became sheo was alive at the time of the oblivion crisis)
so it is highly likely that all 3 of these bad asses are aive at the same time now here where my question comes in who would win out of the 3 and what would happen if all 3 of these guys teamed up( you know to go adenturin together and just killing all that gets in their way)