This answer will focus on more contemporary selections as the classics are named that for a reason - they have stood the test of time and their continued presence in classrooms serves as a fantastic recommendation in itself. The books and authors listed below are in high-demand in my own classroom library of seventh-graders.
The Hunger Games Trilogy by Suzanne Collins is a fantastic adventure series with appeal to boys and girls alike, including many reluctant readers. These books contain fighting/battle sequences that are appropriate for the upper end of the age range specified. A link to the summary is included below.
The Compound by S.A. Bodeen is a fantastic book with an unfolding mystery about a family in an underground shelter following the aftermath of a nuclear holocaust. Their food provisions are dwindling, and they are forced to consider utilizing the "supplements" as a food source...
Scot Westerfeld has a fantastic trilogy (plus a later addition) called Uglies, which includes Uglies, Pretties, Specials, and Extras. These books focus on a society here everyone must conform to a preset standard of beauty. The summary link in included below. The book has a science fiction feel without being over-the-top sci-fi and serves as a good introduction to the genre.
Lurlene McDaniel has written numerous titles that have emotional appeal. She tackles heavy, emotionally-charged topics like cancer and other long-term illness with sensitivity and tenderness. Because of the topic matter, her books are more suited for the upper end of the age range mentioned. A link to a list of her books is included below.
The American Library Association publishes yearly lists of literature that is noteworthy, making it a great resource when looking for titles for either a classroom library or as part of the curriculum.