Really bad images but;
WGF old Z, TWD, WGF New Z, TWD, WGF Female, WGF Male
Copplestone, TWD, WGF Male
Hopefully gives you a bit of an idea. Height wise the WGf survivors are ok, but he proportions are much less heroic (though the weapons aren't actually that off). Mixed they look 'ok'.
Zs Work ok but not the old Zombie Horde things.