Tarzan simply lacks the brutality or the strength to win, Kraven bags a kill fairly quickly, Too put it in terms, Tarzan is as strong, fast, and agile as a man with a large amount of exercise every day and with a good diet. Kraven Is Super strong and can lift several tons, he can move at super human speeds, and has reflexes beyond any normal human's. Plus Kraven is a good deal smarter than Tarzan. Tarzan just has savage fighting skills that apes use, Kraven is a well honed Killing machine.
Kraven. Tarzan's ONLY hope of success is to use the animals. And those will likely only give him time to get away and nothing more. Kraven will quickly rout them. Kraven has defeated Ka-Zar before which is almost the same fight (minus the animal control, but Ka-Zar has a sabre-tooth tiger which is a sufficient replacement).
I'm not sure how different Disney's Tarzan is from the original, but according to wiki, the original Tarzan has abilities above and beyond those of ordinary humans. He regularly wrestles bull apes and gorillas, "rhinos, crocodiles, pythons, sharks, tigers, man-size seahorses (once) and even dinosaurs (when he visited Pellucidar)." And he's not retarded, considering he has a propensity to learning new languages (English, French, Swahili, Ancient Greek, Ancient Latin, Mayan, etc).
So I wouldn't say curbstomp. Kraven would probably still win, due to his extensive H2H knowledge. I'm not an expert in Tarzan lore though.