The phrase "prominent deniers" refers to people who are well-known and influential individuals who reject or refuse to believe something that is widely accepted or supported by evidence. Full definition
Oklahoma Republican Sen. James Inhofe who calls global warming a hoax, along with other prominent deniers of global warming, has said scientists should focus on what is «not melting.» (insideclimatenews.org)
I observed one prominent denier years before he became a denier. (desmogblog.com)
Its «panel of experts» include News Ltd blogger Andrew Bolt, denier blogger Jo Nova, and prominent deniers William Kininmonth, Bob Carter, Ian Plimer, David Flint, and Christopher Monckton. (sourcewatch.org)