Sentence 3 serves as a strong opening, setting the context of the philosophy of defining terms, particularly in relation to superheroes. It states that despite the recent philosophical attention to superheroes, there isn't a clear definition for this domain. Following this, sentences 4 and 2 present two definitions from Oxford English Dictionaries. Sentence 4 introduces the Oxford English Dictionary's generic definition of a superhero, which doesn't specify the character's disposition. Sentence 2, then, presents the Compact Oxford English Dictionary's more specific definition, which includes the term "benevolent". Finally, sentence 1 provides a counterpoint to the term "benevolent" in the previous definition, suggesting that not all superheroes would be described as such, with characters like Hulk and the Punisher serving as examples. So the sequence 3-4-2-1 builds a coherent paragraph that introduces the lack of a clear definition for superheroes, presents two dictionary definitions, and then critiques these definitions based on examples from the world of superheroes.