Chessmaster1000: Kasparov was the first champion who was entirely professional, both politically, preparation-wise and socially. The others were a bit quirky and did not present themselves well to the public at large. Kasparov's rock and roll blitx in 1987 at St. Johns with Short was a great example of orchestrating popular chess for the masses.

BUT..best of all time..Capa and Morphy lost so few against their contemporaries. Alekhine was possessed of something special too...i'll work on resurrecting them. I'd rather see them play fischer chess, that would be something.