I was look at front-ends today while I was driving and noticed these cars that wouldn't need much grille blocking...
Buick LeSabre:
Chevy Impala:
.jpg)
(Even the high performance police car doesn't need much grille.)
Oldsmobile Alero:
.jpg)
(The Alero I saw had the license plate blocking most of that center grille, and the side grilles appear to be mostly closed off.)
Chevy Camaro:

(There's NO exposed grille!)
1986 Z28:

(Again, NO exposed grille!)
Pontiac Bonneville -- I couldn't get a decent photo, but these two together show it pretty well:
I saw some Hondas (Accord, Civic, Odyssey) and a Ford Escort whose stock setup had little grille, but I can't figure out what year they were or find pictures.
Why does the Prius need so much gaping grille? Here's someone's Prius partial grille block:
What other cars have little or no grille area?
__________________