I would add LBJ up to 1966.
Lyndon also had accomplishments after 1966, like the Fair Housing Act, a bunch of consumer and environmental protection laws, the Gun Control Act, the appointment of Thrugood Marshall, some executive actions to strengthen equality, a balanced budget for 1969 and the American space program that laid the groundwork for the successful moonlanding months after he left office. While 1964/65 were the highpoint, he wasn't done in 1966.
I saw an interview of his from 1973 where he called 1968 one of his most successful years domestically .
Though Vietnam did start to unravel by 1966 and by 1968 had collapsed into full blown chaos .
