We don't have synonyms for muckrakers yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are muckraker, muckrakes and muckrake.
(n) :
(US) One who investigates and exposes issues of corruption that often violate widely held values; e.g. one who exposes political corruption or the poor conditions in prisons.
(n) :
(US, historical) One of a group of American investigative reporters, novelists and critics of the Progressive Era (the 1890s to the 1920s).
(n) :
(British, derogatory) A sensationalist, scandalmongering journalist, one who is not driven by any social principles.
(n) :
(US) One who investigates and exposes issues of corruption that often violate widely held values; e.g. one who exposes political corruption or the poor conditions in prisons.
(n) :
(US, historical) One of a group of American investigative reporters, novelists and critics of the Progressive Era (the 1890s to the 1920s).
(n) :
(British, derogatory) A sensationalist, scandalmongering journalist, one who is not driven by any social principles.