If as the dragonborn first how to do such a thing. Side with the Imperial Legion next at the end of the civil war convine the now High Queen Elisif to mary my charecter. After that then call for a moot and get the suport of the other Jarls and become High King of Skyrim. Then as get suport of the Elder Council and the King of Dagerfall. Then claim relation to the Septim Blood line and as right of Dovakin declare Emporer. Forcing Titius Mede to step down as Potentate peacfully Fingers crossed he exepts and steps down. (Also this is done as an imperial playtrogh and has gone threw all DLC sideing with the Dawngaurd). Next the anexation of Morrowind as a member of House Telvani they will hopefully side with me. Next Redoran I am an ally of them so if I get them then the rest of the councile will go with it. After that remakr great house Hlaalu and rebuild Mornhold. Next Hammerfell with the Pentenius Oculatus under mine the athourity of the crowns and up it for the forberers then get them to rejoin the Empire. After words go to Blackmarsh and offer them the same deal Tiber Septim gave them. Now with all of theis new provencis Build up the defences of Cyrodiil. Next purge the thalmor from the Empire declar Talos worship legal, reinstate the blades and invade valenwood and Elswere. if all goes well the rest of tamriel can concore all of the aldmeri dominion. Then leve a much more united and stable Tamriel.
Me, Emperor of Tamriel? ALL THE CHEESE I WOULD EVER WANT!!!