The Nashorn, as far as I can tell, is on the 4th row, third icon from the right (if you don't count the crane it's second from the right).
First row: Sturmgeschütz III, Daimler Dingo, Sturmgeschütz IV??, BT-7??, CV 3/33, Hummel, M3 A3, Sherman Firefly, M3 A5, pass, pass, Panther, L6/40??
Top row left - Sexton SP 25pdr artillery - very handy weapon, made by Canada, on the "Ram" chassis (very similar to the American M3 chassis) Also Canadian: 6th row left - Ram Kangaroo APC - a true armored personnel carrier, basically a turretless medium tank. Used along with the Sexton, in Holland/Germany '44-45. Here's an obscure one: 4th row, between the halftracks: White Scout Car, basically a halftrack body but with 4 wheels instead! Used by British Recce for carrying small mortar support etc. 3rd row, following the Flail tank. I'm afraid I'm not sure, but it looks like either a British Comet (11th armored division 1945) or a Centurion (April 1945 Germany) I wouldn't want to be in the M24 Chaffee, right in front of the King Tiger!
I don't think it can be a Comet, since that tank was hardly bigger than the Cromwell (second on the sixth row). Don't know what else it could be though, was the Centurion that much larger? As to the White Scout Car, I thought the standard White M3A1 halftrack was based on the Scout Car version of the same vehicle, not the other way around.