I was going to vote for the C-Type just to be a contrarian as nobody else had! It did win the LeMans 24hr on it's 1st attempt after all! But reading the early one's had drum brakes and were flawed in other ways, including aerodynamics lifting the rear at over 120mph, I had to go with it's sucessor the D-Type, which was an absolute beast, and spawned the beautiful E-Type.
I'm also surprised not to see a MK2 on there, as this was quite iconic and groundbreaking in it's day. But given it's competition success, technological advances and current values, I'm going with the XK140 D-Type. Yes please, I'll have a green one