Although I continue to stand by that assertion, the truth is that a number of TurboGrafx-16 games featured cover art that wasn't completely atrocious. In fact, some of it is downright acceptable (if not altogether amazing). Hopefully the five examples below--arranged in alphabetical order--will help prove that point.
2. Chew Man Fu--It has to be said that this odd game's box art is far less interesting than its Japanese counterpart (called Be Ball). That said, it's appealingly colorful, and the illustration of the mustachioed dude serving as its focus isn't hideous. Because of that, I think it more than earns a spot on this list.
3. The Legendary Axe--Full disclosure: I've never been much of a fan of this gritty platformer, despite the fact that every other TurboGrafx-16 owner back in the day slobbered over it like it was a photo of Daniel Craig in the buff. I've always liked its cover art, though--thanks it large part to the humongous spider that takes up most of its acreage.
4. Monster Lair--Here's another piece of TurboGrafx-16 box art that I've long been a fan of. In fact, I prefer it and its muted pastels by quite a margin to the comparably bright art that graces the cover of the game's Japanese release (Wonder Boy III: Monster Lair).
5. Neutopia--I have a feeling this choice will divide viewers. Personally, I like its unique perspective and bold use of reds, oranges and yellows, but I'm sure some will find it to be the definition of gaudy. On which side of the spectrum do you stand?
See also: 'Five favorites: Japanese DS box art' and 'Five favorites: Japanese Wii box art'