Tough question. I have a soft spot for the Panther, the first tank of which I ever owned a model. It looks good, and it’s a fair match with the T-34 as the best medium tank of the war, but the T-34 had a significant edge when it cames to mechanical reliability and ease of production, so the T-34 would win on points despite its rougher looks. I also rather like the Maus, which looks surprisingly sleek for such an outrageously enormous machine; it gets additional points for ambition and record-setting, but a big entry in the debit column for being wastefully impractical. I don’t have any great affection for the Sherman, but I have to give it credit for recognizability: to paraphrase the Ronson lighter slogan that was applied to it, it’s the only WWII tank that I can “always spot the first time, every time” when I see one in a movie, due to the elongated chevron shape of its upper hull. I’ve seen at least one low-budget WWII film (made during the war) in which a couple of obvious Shermans are being passed off as Japanese tanks by having had a rising sun flag painted on their sides. I got a good laugh out of that one.