Which dramatic theorist founded the théâtre alfred jarry in 1926, produced strindberg’s dream play, adapted shelley’s the cenci, and theorized a theatre of cruelty which was more significant for its ideas than the actual plays it produced?

Antonin Artaud

Explanation:

Antonin Artaud was a French dramatist, poet, essayist, actor, and theatre director. He is best known for conceptualizing a 'Theatre of Cruelty'.  

In 1926, Artaud founded the Theatre Alfred Jarry with Robert Aron and expelled Surrealist Roger Vitrac. The Theatre was short-lived, but was attended by an enormous amount of European artists.  

His “theatre of cruelty,” was a primitive ceremonial experience intended to liberate the human subconscious and reveal man to himself.  

Artaud’s own works were less important than his theories. For example: his adaptation of "Les Cenci", performed in Paris in 1935, was a failure.