The 1983 miniseries "Kennedy" shows him poorly. Gardenia's portrayal is almost funny, though. The mid 70s biopic "The Private Files of J Edgard Hoover", however, done a couple of years after his death is worth a look-see.
Broderick Crawford plays him as somewhat complex. Not really a pure villain, but greatly flawed, not beneath some skulduggery, and in some ways even sympathetic. In...