Alexei Navalny (Навальный, Алексей Анатольевич)

Casually barred from the 2018 presidential campaign:

His Wiki page does say one thing of interest though, he has right wing tendencies which scared off liberals:

The BBC noted in a profile of Navalny that his endorsement of a political campaign called "Stop feeding the Caucasus" and his willingness to speak at ultra-nationalist events "have caused concern among liberals".