Not any specific one, but I was a huge fan of Frank Jacobs, I guess he wrote the plurality of the song parodies for MAD, Sam Hart, a few others, but that was also where I was first exposed to the art form of song parodies.
Peace! and no longer from its brazen portals The blast of War's great organ shakes the skies! But beautiful as songs of the immortals, The holy melodies of love arise.
You would never hear any song played twice in the same way. The words were retained, but within a certain frame there was great latitude, and the musician could improvise to his heart's content; and the more the variations and combinations, the greater the musician.
I shot an arrow into the air, It fell to earth, I knew not where; For, so swiftly it flew, the sight Could not follow it in its flight. I breathed a song into the air, It fell to earth, I knew not where; For who has sight so keen and strong, That it can follow the flight of song? Long, long afterward, in an oak I found the arrow, still unbroke; And the song, from beginning to end, I found again in the heart of a friend.
A lot of times, the choice of the right song will save a scene. Or there will be a scene that's a little flat and you put in the right song and somehow it just comes alive.
Even the song of birds, which we can bring under no musical rule, seems to have more freedom, and therefore more for taste, than a song of a human being which is produced in accordance with all the rules of music; for we very much sooner weary of the latter, if it is repeated often and at length. Here, however, we probably confuse our participation in the mirth of a little creature that we love, with the beauty of its song; for if this were exactly imitated by man (as sometimes the notes of the nightingale are) it would seem to our ear quite devoid of taste.
It's easy to say that reducing a song to 90 seconds on "American Idol" strips off so many things, and how it's the 21st century and music doesn't mean the same things to people and that it's so disposable.