Well, if we exclude the Legendary E Type, and the current F Type ( which is my absolute favorite modern Jaguar Coupé ), we had:
The XJ:
Then, from 1996 to 2006, the XK first generation:
Replaced by the XK second generation, in 2006:

If I had to choose, it would be a tie between the XK 2d generation and the XJ. I don't like the XK first generation that much, because of the rear and front lights and the body, which is too " chamallow " for me.
You?
Best,
Nicolas
PS: Credit photos: Classic Car.