The highest scoring German Tank Ace of WW2 was Kurt knispel. He was credeted with 168 confimed kills. Many of his comrades said he should have been credited witha much higher score, somewhere near the 200 mark. It is said that he was often over looked because he was in the German Army and not the SS. Also for a long time he was a gunner noit a Tank commander.
Whichever way you look at it he scored more kills than Carius and Wittmann and should be accorded the accolades due him for his excelllence wit ha Tank. Also Carius had more kills than Wittmann, he was credited with 150 enemy tanks destroyed, and finished the war in command of a JadgTiger.
The best book on Wittmann is "Michael Wittmann and teh Tiger Commands of the Liebstandarte" by Patrick Agte, as long as the "bombastic" nature of the writing doesn't get to you.
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Hawkeye