So to begin with some good old British tanks...
British Infantry tanks to start with:
So from the left on the first line:
Valentine Mk XI
Matilda II Frog (flamethrower)
Matilda II Scorpion (mine flail)
Matilda II
Churchill II
Churchill I (it has a 3 in howitzer in the hull)
Churchill IV (57mm (6pdr) gun)
Churchill Crocodile (flamethrower)
Churchill VII
Black Prince
On the second line from the left:
Valentine Mk I
"" MK I DD (Swimming tank)
"" MK III
"" MK VIII DD (Swimming tank)
"" MK VIII
Now the British cruisers (my favorite)
So, from the left:
Cruiser Mk I (A6)
Cruiser Mk III (A13)
Cruiser Mk IV (A13 MkII)
Cruiser Mk V (Covenanter)
Cruiser Mk VI (Crusader I)
Cruiser Mk VI (Crusader II)
Cruiser Mk VI (Crusader III)
Cruiser Mk VIII (Cromwell)
Cruiser Mk VIII (Challenger)
Firefly
Comet I