Apart from a small typo in (5), they all look OK. (7) is not a sentence.
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vdb 5. Suddenly Roy's face. which had been sombre, set, and haunted, lit up in his most lively and impish smile.Suddenly, Roy's face, which had been sombre, set and haunted, lit up his most lively and impish smile.
UserTK Suddenly, Roy's face, which had been sombre, set and haunted, lit up his most lively and impish smile.I don't think his face lit up his smile -- more likely the other way round.
GPY UserTK Suddenly, Roy's face, which had been sombre, set and haunted, lit up his most lively and impish smile.I don't think his face lit up his smile -- more likely the other way around.I disagree.
UserTKA somber and haunted smile will not light up one's visage. It is highly unlikely, at least to me.The smile is lively and impish, not sombre and haunted. "sombre, set, and haunted" describes his face prior to the smile appearing.
vdbSuddenly Roy's face, which had been sombre, set, and haunted, lit up in his most lively and impish smile. The "in" after "lit up" sounds awkward to me. I think that the "in" should be replaced with "with." A face is lit up with a smile, not "in" a smile. Am I wrong?"lit up in a smile" is OK. You can see a few dozen instances from competent writers here:
vdb lit up inlit up in is a verb, i.e. a phrasal-prepositional one.