Immoral and unethical/criminal are not the same thing. With that in mind, the only thing that you have said about Trump that doesn't apply to the others is that he has had multiple marriages. JFK and Clinton both had known adulterous affairs, and no one knows how many others there are. You don't use your position as a means to gain sexual favors without being guilty of sexual harassment, ergo both JFK and Clinton are undoubtedly guilty of sexual harassment. It could be argued, however that whereas Trump is guilty of much immorality, JFK and Clinton both were guilty of it while in the White House. Look, I have no qualms with someone saying that Trump is a bad person, he is, just don't go and say he was "the MOST immoral person EVER" to be president.
On a side note, it is a well known fact that every president for the past 50+ years have been a liar, and 10,000 lies in four years only comes out to about 7 lies a day. I know "Pastors" who lie more than that.