For me, Henry VIII is definitely first rate, comparable to Samson et Dalila- all of the characters spring to life, through great music forged to a fine libretto. Unlike the triumphant end of Samson et Dalila, the end of Henry VIII is chilling, and that is a big part of its power! The video of the 1991 production (on Kultur) though somewhat underfunded (and it shows) is worth seeing and illustrated that an excellent opera Henry VIII is. As for Les Barbares, Saint-Saens seemed to be working toward a more austere music palette- he writes of a perfect balance between all of the aspects of opera, and I am not sure that it works- though it may have in the theater (for which it was written). Saint-Saens claimed that Helene was (among) his best works- he served as his own librettist and it too is beautiful, but is about development of musical themes without big standout melodies. Saint-Saens mentioned that "others would achieve" the goal of perfect balance- and indeed it may be that Debussy did, in Pelleas et Melisande ... much to Saint-Saens consternation! Without sounding like a broken record, (LP!) I am finding Etienne Marcel to be full of drama and melodic- the libretto has problems- it is a tragic story that has a happy ending, which is a form that is no longer in style.