I have always liked the late-1960’s/early-1970’s MB sedans, and still do. The Jaguar sedan, as shown, still looks sooooo elegant. The Corvair four-door hardtop still looks stylish and sporty, reflecting the lightness it possesses. Not really a Tri-5 fan, and I would certainly not want the boxy sedan, were I to buy one. The Lincoln looks classy even today, even more so in convertible form.
I agree with those who cite the (now over 20 years old!) Impala SS; I drove a new one in 1996, and sometimes wish I had bought it. Good looks, good power (at the time), and good handling and brakes - not to mention room! I did like the Marauder, too, but its performance was disappointing.
I had a 2009 Lacrosse Super, with the LS4 V8. Curvy and stylish, with great acceleration, good handling, and a comfortable ride. I wish most every day that I had kept it. Maybe it will be a collectible someday (less than 3000 were built in 2008 & 2009, I believe), maybe not. But, what a ride!
Since they were SO numerous, it is easy to lose sight of what a good-looking sedan (and coupe) the 1997-1993 Grand Prix was. I had one of each; with the supercharged 3.8 option, they would scoot, too.