immortal fallen angel
literally older than middle earth
so impatient that he launches an all out assault on middle earth because he needs to take over immediately for some reason
if sauron wasn't a retard he would have just encouraged orc immigration into the west, just a little bit at first and then more and more over a few generations until gondorians were a minority in minas tirith and the edoras sports teams were full of uruk-hai, then there would be no stopping him