Kane was best as Issac Yankem D.D.S.
The originality of the Undertaker is amazing. When he first appeared on the scene, it was almost believable that he was some sort of living dead man, the whole gimmick was executed perfectly. Having Percy control him and do most of the talking helped create even more mysterious interest in the character and made it special when the Undertaker would say a few words.
The Kane character was basically a re-packaging of the fundamental Undertaker character.