LBJ
-Failed War on Poverty
-Political Opportunist
By failed I assume you mean that the national poverty rate is higher today than it was before those policies were implemented? Because presumably that'd be the first statistic to look at in determining that.
That being said, there were certainly things I didn't like about him either, but I still think he was pretty vastly underrated, at least by a lot of people who look only at Vietnam. He was very old school even for his time, which got him into a lot of unnecessary trouble.
I voted Bush 43, though he was far from the worst President of all time as many have suggested. Quite several that were worse in the 1800's and early 1900's.