Honestly. Is Trump not more controversial than Obama?
How Trump will end up in the history books wholly depends on whether he succeeds in his attempts to curtail globalism and save the USA from becoming insolvent due to the rising debt. If the economy fails his presidency will as well and with that he'll be remembered for all the controversy around his political career. If he succeeds he'll be seen as a 'realpolitiker' who pulled the USA out of the downward spiral it had been in since ... the late 90's? The end of the cold war?
Of course there is also the chance of a large-scale conflict breaking out during his watch in which case his place in the history books also depends on how that ends.
Time will tell.
That's a fantasy. His mere existence in the position, contradicts the premise. Hillary hoped to be in a similar position...history would have also been kind to her, despite her vicious nature by the obvious virtuous implications (a woman can become POTUS).