1. Rolls Royce
4. Mercedez (owner of the Maybach brand)
Debatable whether you can count Supercar makers, like Bugatti, McLaren, etc. since they have so few models and are not made for mass production (in fact they're all hand-made in the case of those 2). In terms of mass market luxury, Porsche tends to consistently be on top of that - but like all things luxury it will come down to individual taste and preference.