The top leaders are always well-known, but not those who work with the nuts and bolts.

VOA: special.2009.11.01

In politics,a dark-horse candidate is someone who is not well known to the public.

VOA: special.2009.07.12

"Even (Supreme Leader Ayatollah) Khamenei realized that they should not do this with a well-known journalist,".

VOA: standard.2009.05.06