I'd argue the S Class and Panamera and 7 Sereis even with its big grille all look a lot more imposing and better.
I guess it's always going to be a matter of personal preference. S class is clean and handsome but fairly bland, especially since Mercedes has copied the same shape and details right down to the $40k mark. 7 Series is a disaster. Panamera is gorgeous but not exactly in the same class, IMO - competes more with the CLS and A7. The A8, like the S Class, is clean and conservative but extremely boring.
You all know my qualms with the LS, but design is certainly not one of them: