Im only gonna do ICP since that what he asked for.
Carnival of Carnage - The Juggla, Redneck hoe, Guts on the cieling, Wizard of the Hood, Night of the Axe.
The Ringmaster - For the Maggots, Fun House, Wagon Wagon, Chicken Huntin (Original)
The Riddle Box, Chicken Huntin (slaughter house remix), Toy Box, Cemetary Girl, The Jokers Wild, lil somthin somthin, Ol' Evil Eye, Im Comin Home.
The Great Melinko - Southwest Voodoo, Under The Moon, The Neden Game, Down with the Clown, Pass Me By.
The Amazing Jeckal Brothers - I Stab People, Another Love Song, Assassins, Nothing Left.
The Wraith: Shangri-La - Walk into the Light, Welcome to the Show, Ain't Yo Bidness, We Belong, The Wraith.
Lots of good songs on thier compilations/previously unreleased material albums too, but I wouldnt recommened the albums to someone just beginning to listen to them, becuase their is alot of stale songs you have to weed out.
Not saying these are the two best jokers cards, just that they are probably the two best produced ones, as far as quality, and grab the listener better from beginning to end are The Great Melinko, and The Wraith. Couinsedently the two most popluar of thier albums, since they didnt have a real fan base untill the Disney dispute of Melinko, and gained the respect of poser juggalos everywhere, that soon died, and has been slightly rekindled by The Wraith.