1. "Singleton" (enough said) 2. "Template method" is more or less "inheritance over delegation"

There's also a couple like Flyweight that are of such narrow applicability that they hardly merit placement on the short list with classics like Composites and Factories, and a few new items like Dependency Injection are surely worth a mention whether you want to argue for or against it.

Finally it's got an approach to presenting and explaining the patterns that clearly predates the web and modern attention spans. All that said, it's still a classic, but depending on the preferred language and technical proficiency of the reader it wouldn't always be my recommended introduction to design patterns.