Well, you could probably do something with upvotes/downvotes, particularly if the system tallied these two counts separately, which (AFAIK ...) it currently does not.   If an article received upvotes, and whether-or-not(!) it received downvotes as well, I think it would be a “best.”

This would more-or-less mimic the behavior of other forum systems, which normally allow you to say that you “like” an article but not that you “dislike” it.