When are we assuming this flood was? Various animals common today are younger than that or bred from their wild equivalents and could possibly be rebred.
How wide is the taxonomy? I see cats mentioned above and if that is just going to be the domestic housecat there are a variety of other choices, including wildcats which are variously subspecies.
Anyway I am going with cows (both Indian and European versions so basically the whole Genus Bos to include banteng, yak, gaur and others). Mainly as it would piss a lot of people off. I enjoy eating them, drinking their milk and its various products, and wearing their skins but yeah leave of Bos. Probably would have made history quite different as well as they are pretty decent draught animals.
As for kangaroos they are quite tasty and have great leather so I don't know.