Michael Moorcock

Michael John Moorcock (born 18 December 1939) is an English writer, primarily of science fiction and fantasy, who has also published literary novels. He is best known for his novels about the character Elric of Melniboné, a seminal influence on the field of fantasy in the 1960s and 1970s. As editor of the controversial British science fiction magazine New Worlds, from May 1964 until March 1971 and then again from 1976 to 1996, Moorcock fostered the development of the science fiction "New Wave" in the UK and indirectly in the United States. His publication of Bug Jack Barron by Norman Spinrad as a serial novel was notorious; in Parliament some British MPs condemned the Arts Council for funding the magazine. In 2008, The Times newspaper named Moorcock in their list of "The 50 greatest British writers since 1945".

https://en.wikipedia.org/wiki/Michael_Moorcock

His views on sci-fi
http://flag.blackened.net/liberty/moorcock.html

...Leaving aside the very worthy but to my mind journalistic The Dispossessed by U.K. Le Guin, it is quite hard for me to find many other examples of sf books which, as it were, 'promote' libertarian ideas. M. John Harrison is an anarchist. His books are full of anarchists -- some of them very bizarre like the anarchist aesthetes of The Centauri Device. Typical of the New Worlds school he could be described as an existential anarchist. There is Brian Aldiss with his Barefoot in the Head vision of an LSD 'bombed' Europe almost totally liberated and developing bizarre new customs. There are J. G. Ballard's 'terminal ironies' such as The Atrocity Exhibition and Crash and so on, which have brought criticisms of 'nihilism' against him. There is Joanna Russ's marvellous The Female Man. So little sf has fundamental humanitarian values, let alone libertarian ideals, one is hard put to find other examples...

He's definitely been on my list ever since I heard the Blue Oyster Cult song "Veteran of the Psychic Wars". The "Eternal Hero" sounds Sisyphean.