The Dragon Compendium actually features a Mountebank, a Savant, and a Jester class (Mystic I don't recall being in there, off the top of my head). The Mountebank and Savant classes, as I (hazily) recall them, could be covered in 3rd edition by a judicious allotment of skills and feats for the Rogue (in the former) and by a Diviner/Loremaster. The 3e versions in the Dragon Compendium - an otherwise fine product - are almost unrecognizable as what Gary proposed way back when. This is especially true of the Mountebank, the Dragon Compendium version of which doesn't even come close to the dictionary definition of the word. I was very disappointed in that one, in particular.