Alexei Anatolievich Navalny (Russian: Алексе́й Анато́льевич Нава́льный, Russian pronunciation: [əlʲɪkˈsʲej ənɐˈtolʲjɪvʲɪt͡ɕ nɐˈvalʲnɨj]; born June 4, 1976) is a Russian lawyer, political and financial activist, and politician. Since 2009, he has gained prominence in Russia, and in the Russian and international media, as a critic of corruption and of Russian President Vladimir Putin. He has organized large-scale demonstrations promoting democracy and attacking political corruption, Putin, and Putin's political allies; he has run for a political office on the same platform. In 2012, The Wall Street Journal described him as "the man Vladimir Putin fears most". Wikipedia
Most popular today Alexei Navalny and Larry King directly after him.